The greatest power God gave us is the power to choose. We have the opportunity to choose whether we're going to act or procrastinate, believe or doubt, pray or curse, help or heal. We also choose whether we're going to be happy or whether we're going to be sad.
I do know this: God does answer your prayers, but it's not always in the way you expect. God knows what's best for us, though, so there's no need to worry when things don't go how we originally wanted them to go.