I am currently tracking:
- calories, fruit and veggies servings, items, weight - using my own app that I made in rfo-basic:
https://play.google.com/store/apps/details?id=com.rfo.speakcc - pulse - just using a free camera app along with KeepTrack for Android
- miles driven - with Keeptrack
- bank account balances- with Mint.com
- weekly steps - with a cheap Omron Pedometer and KeepTrack
- dining expenses -again with my own app: https://play.google.com/store/apps/details?id=com.rfo.ezexpense
I would like to use a FitBit to track my sleep but I have a nasty habit of losing those things 
If you would like to try making your own simple apps for Android, I highly recommend rfo-basic: https://play.google.com/store/apps/details?id=com.rfo.basic