Recently I was working on a javascript project that someone else created. I needed to fix a few things and add a new feature. The person previously created this little log function that was part of the main object.

var object = {
log : function (data){
if( typeof console != 'undefined')
console.log(data);
}
}
};
view raw gistfile1.js hosted with ❤ by GitHub

Now I know it's the simplest thing but totally takes care of having to delete console.log() on code going to a production site. I know it's the little things but this is something I'm going to include in all my projects going forward.