My phone turned into my old BB. I had to pull the battery like once a week.
I added an OS monitor and found that the Virus app (one shaped like a pill) was pages and pages of apps running.
I deleted it from my phone and for probably 2-3 weeks it's ran just like it should.
Made a HUGE difference.
I don't know if this will help many, but it might be worth trying some sort of OS monitor and see what's running or taking up a lot of space/time on your phone.
I am not tied in with any OS monitor program and I think you can get them free, so it wouldn't matter if I was. It saved me from boucning my phone off the asphalt. Worth a shot.