Originally Posted by emilyt93
I use my Task manager and close all of the apps. I go into my apps & force close any running apps that I am not using or don't need running. Honestly, I don't know if this really helps or anything but I've been doing it before my SIII. Does anyone else do this?
I do it sometimes because I am afraid an app is running in the background when I don't want it to, but it's been well-discussed here that this procedure doesn't save any battery and probably costs some. Android is very good at stopping apps from using battery once you've switched apps or returned to the home screen. It keeps the apps you use most loaded into memory, and if you close them with the task manager then (1) it will be confused about the apps it should keep loaded, and (2) when you open those apps again it will take battery and time to reload them.
What is important, though, is to be aware of all the apps you have and which ones sync. You should set the sync rate for those apps to the lowest number you are comfortable with. So, for example, I set my Facebook refresh interval to "never" (it synchs when I go to the app), and my email only syncs when I press the sync button. I also disabled a bunch of Samsung apps and removed my Samsung account so it won't sync.