Travel is probably the best thing to spend money on. Get out. See the world. It's big and it's weird and you come back a better person for having reveled in it.

(I did 2 months last year - 1 month in Thailand/Laos, 1 month in Europe & Egypt. No regrets, at all, save the mad case of food poisoning in Egypt, but I'll spare you the gory details ;)