Here are some coding standards

standards.js

////////////
// jQuery //
////////////

// 1. Name jQuery objects so that we know what they are
var $container = $("div");

///////////////
// Normal JS //
///////////////

// 1. 1 var per function
// 2. function not too long
// 3. define the length once, it's optimized
// 4. initalize vars with relevant type?
// 5. for loop over foreach. it's faster and better supported. don't care on server-side
// 6. Var stuff is all indented
// 7. Function declarations better than function expressions because of hoisting
// 8. Variables that don't get initialized (just declared) usually hang out at the bottom of the var call.
// 9. Semi-colons make it easier for me to read the flow
// 10. So does consistent tabbing

function bla(someArray) {
    var hi = "",
        k = [],
        len = someArray.length;
        i = 0,
        k;
        
    for (i = 0; i < len; i++) {
        doSomethingWithI(i);
    }
}

function doSomethingWithI(i) {
    var x = 2;
    return x * i;
}

/////////////////
// Server-side //
/////////////////

// 1. Take advantage of native-stuff wherever possible
// 2. console.log is easier than most things and takes multiple args
// 3. Don't leave in extra requires statements

Date.now(); // faster than new Date().getTime()
Array.isArray(); // better than underscore
Object.keys(); // returns the keys, yep
var arr = [1,2,3];
arr.forEach(function(val) {
    console.log("Val", val);
});

////////////////
// Good Links //
////////////////

// 1. http://kangax.github.com/es5-compat-table/
// 2. https://developer.mozilla.org/en/JavaScript/Reference/