Groupon is a site that sends you daily emails about deals in your city. They have deals for food, massages, haircuts, house cleaning, activities--basically anything you could want to do at a fraction of the cost.
I have bought deals for Pilates classes, the YMCA, and Let's Dish, to name a few.
Sign up for free daily emails here: http://www.groupon.com/r/uu1
Just choose your city and submit your email address at the top of the screen to subscribe.