Materialistic things to some extent. The act of working, and getting something out of it. But overall, just generally everything around me such as family, my career etc.
The #1 thing that motivates me though is the fact that I know I'm going to heaven to see God when I die. At that point all the materialistic things will mean nothing. But for now I'd say the fact of progressing in my career, getting stuff done, and working for the things I want. Sure winning a huge sum of money would be great, but working for my money keeps things more interesting and motivates me to keep working.