The Groupon App alerts me on the daily deal. They have some pretty good stuff on there sometimes!
I got $5 African Safari tickets that are regularly $17.95! African Safari Wildlife Park is in Sandusky and it's an actual drive-thru park where the animals roam and come right up to your car and you can feed them! Fun Stuff!
I've also gotten $35 Old Navy gift cards for $10!
Those are the only 2 things that I have purchased to date but you never know when something extra good is going to come up!
Visit http://www.groupon.com/ and www.groupon.com/mobile for more info.