The Hairpin has invented the Shopping Bracket (pdf) to help women optimize their purchasing power:
Open a tab for every online shop you like. Go through each tab and put everything you like even a little bit into your virtual cart — no commitment to purchase is necessary.
Then force yourself to choose between things, over and over for hours, until it's all the way down to just two items, at which point I usually spend a few minutes mumbling pros and cons before closing the window altogether and basking in a deep sense of relief. And voila! You now have all the endorphins of a full-fledged shopping trip without having spent a dime.
The Dish 