For those people whose iPod's battery life is shorter than what it used to be, there is an easy way to fix it. Assuming you have the newest iPod updater, first save all your stuff from you iPod (music, photos, videos, etc.) to a folder in your computer. Then open up the updater and chose the option where it says Restore. This will wipe your iPod clean and restore it. Then later just put everything back into your iPod.
I am sure that most if not all of you already know this, but I didn't, alright?, and I just wanted to share it with you all because my battery life sucked, then I tried this and my iPod is good as new. I am a happy NG'er now :)