Best Practices for Javascript

Use 4-spaces for indentation (because it's easier to be consistent with Python than it is to switch your editor back and forth).
Javascript variables names should always be camelCase (not snake_case).
Static variables and configuration parameters should be in TITLECASE_WITH_UNDERSCORES.
Named functions should look like this var functionName = function() {}.
Event handlers should be named on + the name of the event generator + the event name, for example onDocumentLoad, onWindowResize and onGoButtonClick.
All global variables should be defined at the top of the file.
All variables should be constrained to the current scope with var.
Declare only a single variable on one line.
End all statements with a semicolon.
Use spaces after opening and before closing braces and brackets in array and object definitions, i.e., { foo: [ 1, 2, 3 ] } not {foo:[1,2,3]}.
Do not use spaces after opening or before closing parentheses, i.e., if (foo === true) { and not if ( foo === true ) {.
When accessing properties of a data structure (such as one retrieved using getJSON), prefer bracket syntax (data['property']) to attribute syntax (data.property).
Very frequent property references should be cached, i.e., var array_length = array.length;.
Use === rather than ==. (Why?)
Use single-quotes for strings.

For consistency, prefer the following libraries to others that perform the same tasks:

jQuery for DOM manipulation
Underscore.js for functional programming (where Underscore and jQuery overlap, i.e., each(), prefer Underscore)
Bootstrap for responsiveness
Moment.js for datetime handling
jPlayer for audio/video playback

jQuery references that are used more than once should be cached. Prefix these references with $, i.e., var $electris = $('#electris');.
Whenever possible constrain jQuery DOM lookups within the scope of a cached element. For example, $electris.find('.candidate') is preferable to $('.candidate').
Always use on, never bind, delegate or live. on should also be preferred to "verb events," such as click.

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