I'd like to do something constructive, maybe tutoring the local college and high school students, but since people are mentioning index funds: I bought a couple Vanguard funds about 8 years ago and have been maintaining an average return of 10-12% which is almost enough to pay rent. I used some of the returns to help pay the down payment for my condo. Now, my rent won't go up anymore. My mortgage isn't much more than my old rent and less actually then one of my previous places. It's also about double the size and arguably in a better location. If I ever get another job some where else and because of it's location I can rent it out extremely easy.