i would get a financial planner, and put all but $1000 into a high-interest account. I would change that $1000 into one-dollar bills, and roll around on them on the living room floor. then i would buy all that stuff on my "list" - new mattress set, canister filters, and some clothes that actually fit. new pants i bought a two months ago are now trying to fall off when i walk. the downside of losing weight when you're poor.
then, depending on interest rates, i would pay off my student loans and the comparatively little bit of other debt i have. after that, depending on how much money i won, it's time for either a house hunt, or even blueprints.
i don't think i would stop working, but i would definitely take time off for a nice amazon collecting trip once the fish room gets set up. and maybe a trip to thailand as well.
oh, i didn't realize it was just fish oriented. . . well, i'd build an awesome fishroom and basically spoil myself silly.