Having trouble deciding whether you should blow money on that new gadget? Budgets Are Sexy has a simple test that might help.
When you are thinking of purchasing something, imagine a stranger holding the item you are thinking of buying in one hand, and the cash equivalent in the other. Which one would you take?"
You might find that you prefer to keep the cash for more important things later on. It obviously doesn't apply in every situation, but it's a clever way to think about big purchases. Hit the link for some other interesting "tests" that can keep you from impulse purchases.
Two Kick-Arse Spending Tips [Budgets Are Sexy]