turn off the freaking useless NFC too. that's just dumb. 1% of people who use nexus phones really take adv of it. turn that off so it wont use your precious juice on the background.
If you don't use it, you should really consider it.
Besides, from what I've read it barely consumes any power in the background... someone else may be able to elaborate. Either way, the time and convenience of the few minor things I use it for are worth it - and I'm barely using it to potential.