How are you planning to blow your $600? I thought I would put together a short list of several options.
1. A bottle of Cristal Champagne, c. 1985
2. Two- Four Day Park Hopper Tickets, with Water Park Fun & More Option, to Walt Disney World Resort
3. Apple's 3G iPhone (Full disclosure, this is how I'm planning on doing my part to stimulate the economy.)
For more items deserving of your not so hard earned cash, check out GQ's "600 Club" featuring 21 such items.
And if all else falls, you could always invest it. (Imagine that.) Might I suggest foreign currencies? Trust me the U.S. Economy is going to get worse before it gets better. And don't hold your breath for this so called stimulus package to do much. In a $13 Trillion economy, $150 Billion is but a small drop in the bucket.
Good night, and good luck.