Luakit default keybindings, commands, and config additions taken from experience and the 35 page luakit thread here:
https://bbs.archlinux.org/viewtopic.php?id=97375 
(The thread is chock full of fantastic information but it's tedius weeding through 35 pages.  
As I have more needs, I'll add to this page as I hunt down more information.)
There is also an official site here:  http://mason-larobina.github.com/luakit/ 
but I had horrible luck finding things and understanding half of what I was reading.  
Hence this page of some basic information to at least get the ball rolling.

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* Input bar is at the bottom of the webpage! *
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Keybindings:
gd=view downloads page in same tab
gD=same but in new tab
B[Enter]=create bookmark of current url
gb=view bookmarks (gB for new tab, you get the idea)
[num]gt=go to tab[num]
d or ctrl w=close tab
D or ZQ=close window
f=follow mode (maps urls in page to keys to be activated by pressing relevant keys)(use F to load urls in new tab)
F=follow mode into new tab
i=insert mode
:=command mode (used at input bar at bottom of page)
Esc=clear all modes, undoes last keypress command
j or down-arrow=scroll down
k or up-arrow=scroll up
Page down=scroll page down
Page up=scroll page up
Left arrow=scroll horizontally
Right arrow=scroll horizontally
Home=back to top of page
End=takes you to bottom of page
+ (plus sign)=zoom in
- (minus sign)=zoom out
= (equals sign)=set zoom
F11=full screen (hit F11 again to exit full screen)
o=open url in same tab
O=open the "open" dialog with the current url for editing
t=open url in new tab
w=open url in new window
r=reload current url
s=stop page loading
u=opens the last closed tabs
H,b,ctrl o, or ctrl i=back
L=forward
Ctrl page-up=previous tab
Ctrl page-down or ctrl tab=next tab
Ctrl t=new tab
s=download
S=multiple downloads
y=yank element uri or description into primary selection (onto clipboard)
Y=Yank element description (copy onto clipboard)
;;=focus element
;i= for opening image sources
;I= for opening image sources in new tab
[num]b=load back page [num] in history
ctrl z=passthrough mode (NO idea what this is yet)
ctrl-ZZ=quit and save session for next time
ZQ=quits without saving
M[letter or number]=quickmark url to that letter or number
(activate by go[quickmark] or gn[quickmark] (for new tab)
Ctrl w=delete word
Ctrl u=delete line
Ctrl h=delete backward one character
Ctrl d=delete forward one character
Ctrl a=go to beginning of line
Ctrl e=go to end of line
Ctrl f=go forward one character
Ctrl b=go backward one character
Mod1 f=go forward one word
Mod1 b=go backward one word


Browser Commands:
:quit
:restart
:open
:lua <code>
:viewsource (views the source)
:viewsource! (goes back to webpage)

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Config files are found in:
/etc/xdg/luakit/
/usr/share/luakit/
~/.local/share/luakit/

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All keybinds are found here (I found it hard reading hence my list):
 /usr/share/luakit/lib/follow/binds.lua
and
 /etc/xdg/luakit/binds.lua

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(Extra bonus: when typing o, t, or w, follow with search engine of choice then keyword. 
Example: typing a t gives me this result at the bottom of the page: :tabopen and a blinking cursor. 
At the cursor, type "duckduckgo arch linux forums" (without the quotes) and there's your list.)

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Default window size can be set here:
globals.lua:  default_window_size

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Change start page:

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Change default search engine:

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How to set all new urls/windows to open as a new tab in current running luakit (compared to a new window) in rc.lua:

             **********

-- always open new window as a new tab
webview.init_funcs.window_decision = function (view, w)
    view:add_signal("new-window-decision", function (v, uri, reason)
        w:new_tab(uri)
        return true
    end)
end
            ***********

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Set default download directory in rc.lua: 
downloads.default_dir = /path/of/choice
Example:
-- Add download support
require "downloads"
downloads.default_dir = /path/of/choice
require "downloads_chrome"

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Quickmarks: Let's you assign a webpage to a specified key. Type M followed by key you wish to assign the page to. 
To open that page at a later time, type go[assigned-key] to open in current tab, or gn[assigned-key] to open in a new tab.

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Pressing f highlights all the links on the page and assigns them a number. 
At bottom of page, type the corresponding number after Follow: to go to it.

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Adblock for luakit:

Use https://gist.github.com/1073680 and put it in your ~/.config/luakit. Name it adblock.lua 

Edit your rc.lua and include:
       ******
require "adblock"
       ******

Then create a file ~/.config/luakit/adblock.blacklist according to the comment in the adblock.lua. 
Here's what works for facebook for example:
facebook%.com

Here's a script which translates hosts files for adblocking into an adblock.blacklist file. Use it as an example only!
http://pae.st/4aiQ/
(courtesy Army in Arch Linux Forums)

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Add scrollbar:
Add the following before the session restore code (last 10 lines) in your rc.lua:

                 *********

webview.init_funcs.show_scrollbars = function(view) 
    view.show_scrollbars = true 
end

                *********

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How to change useragent:
globals.useragent = "Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.1 (KHTML, like Gecko) Chromium/14.0.825.0"

If you append ?nobrowsercheck=true to the end of the gmail.com url (or any other url that rejects unknown browsers?) 
it will let you access it with the normal luakit user agent.

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How to group bookmarks:
Type "B" and then after the link add a word, e.g.
:bookmark https://bbs.archlinux.org/viewtopic.php?pid=983863 Archlinux
:bookmark https://bbs.archlinux.org/viewtopic.php?id=125310 Archlinux

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ctrl-click url=open in new tab

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To use ctrl-c to copy to clipboard, go to insert mode first (press i)
You can then use ctrl-v to paste.

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How to set luakit to save the current session every time instead of only by ZZ, even if it's closed by the window manager:

In your rc.lua, place a session.save() at the top of the window.methods.close_win function:

               ********

local close_win = window.methods.close_win
window.methods.close_win = function (w, ...)
    session.save{w}
    close_win(w, ...)
end

              ********

Another option offered:
Edit window.lua (should be in ~/.config/luakit, or you should copy it to there from the xdg folder).
On line 658 you'll find a function called "navigate".  Add a line just before the closing "end" which is on line 671.  
The line should save the current session by calling w:save_session().

               ********

    navigate = function (w, uri, view)
        view = view or w.view
        if view then
            local js = string.match(uri, "^javascript:(.+)$")
            if js then
                --return view:eval_js(luakit.uri_decode(js), "(javascript-uri)")
                return view:eval_js(luakit.uri_decode(js),
                    "(luakit::navigate)", true)
            end
            view.uri = uri
        else
            return w:new_tab(uri)
        end
        w:save_session()  -- THIS LINE WAS ADDED
    end,

              **********

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To use userconf.lua to remap binds, 
paste the binding aliases there:
-- Binding aliases
local key, buf, but = lousy.bind.key, lousy.bind.buf, lousy.bind.but
then add binds within the brackets:
------------------ binds.lua 
add_binds("normal", {
--for example
   -- History
    key({},          "b",           function (w, m) w:back(m.count)    end),
    key({},          "n",           function (w, m) w:forward(m.count) end),
}, true)

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To disable/enable javascript, scripts, and plugins:

Add this to your rc.lua somewhere between the 'require "webview"' line (make sure it is after "binds" as well) and the "end user script loading" 

     *****
require "noscript"
noscript.enable_scripts = false
noscript.enable_plugins = false
     *****

Then use:
,ts to toggle scripts such as javascript and others for the current domain.
,tp to toggle plugins such as Flash for the current domain.
,tr to remove NoScript rules for a given domain.

Note the , must be typed as well.

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