Burst mode in the camera app
Sometimes taking the right photo at the right time can be challenging. So with iOS 7, Apple introduced Burst Mode to the rescue.
From within the Camera app, simply press the camera shutter as you normally would, but this time keep it pressed down. iOS 7 will take 10 photos in quick succession (this works super-fast on the new iPhone 5s) and will let you choose the one that looks best. iOS 7 will also determine which is best for you if you happen to be the indecisive sort.