Golden Rules of Shopping Online

I am a shopaholic.  There.  I admit it.  In my defense, I get really good deals.  I do the vast majority of my shopping online.  Because let's face it, the best shopping in my 'city' is Target, Macy's and TJ Maxx.  Sad Story, I know.  Over my past four years of living in this sad shopping void, I have refined my online shopping skills to the extreme.  I'd like to consider it one of my talents... if you could call it that.  The hunt for the perfect {fill in the blank} excites me.  I'm that person that fills up their online shopping cart and only buys it 1/3 of the time, just because it's fun.  Over my many years of experience, I've come up with a few golden rules that lead to successful online shopping.

What tips for online shopping do you have?  Do you even bother with online shopping?  Looking for anything specific?  Let me know, I love a good hunt :)