Battery drains extremely quick on phone

The battery on my phone drains extremely quick, to the point I almost cannot use it at all unless it is plugged in. I have had my phone less than a year so I see no reason why it should be doing this. I've tried everything I can think of to conserve power, deleting apps, I have no pictures/videos stored, and it just drains right away. What can I do to help this at all?
