I have an 8Gig 3rd gen iPod Touch which i picked up used about a month ago. I'm beginning to notice that several apps will freeze up and then I'm back at the app menu, this has only happened the past couple of days and all of them were previously stable.

Things such as the app store will have a page displayed, and suddenly black screen and i'm back at the home page again.

Suggestions short of buying a new Touch? (budget won't allow it, and I'm holding out for a Verizon iPhone in the new year)