it's boring but RTFM

In an email from "Picture Correct",  we've heard this many times BUT ...

10 Common Composition Mistakes in Photography

They show this as 10. I think is should be first. You also remember what you read. For example when you are bracketing consider using Sequence shooting. So you don't have to remember the number the times you press the shutter release

10. Not Knowing Your Camera Controls and Functions

You MUST read your camera manual. Knowing your camera and all of its buttons and settings is vital. Being able to do that takes practice. You should be able to adjust ISO, shooting mode, focus point, exposure compensation, aperture, and shutter speed without taking the camera away from your eye. Believe us, it will make a difference that you can’t afford to miss!