I've started to look at life differently. When you're thanking God for every little you - every meal, every time you wake up, every time you take a sip of water - you can't help but be more thankful for life itself, for the unlikely and miraculous fact that you exist at all.
The Bible talks a lot about thankfulness, and I'm more thankful than I ever was. I try to concentrate on the hundreds of things that go right in a day, instead of the three or four that go wrong.