This post is actually even better than my last link for tips on conserving your iPad or iPhone's battery life. Here's an example of the kind of useful tip given:
Step 3: Stop Quitting Your Apps in Multitasking
iOS 7 made it super fun to close your apps: all you have to do is double-click the home button and swipe up on the app preview to blast it into a digital black hole.
What most people tell you is that closing your apps will save your battery life because it keeps the apps from running in the background.
Wrong.
Yes, it does shut down the app, but what you don't know is that you are actually making your battery life worse if you do this on a regular basis.
There are a lot of great tips here, so check it out.