One of the most important parts of any photo is composition.
You must learn the rule of thirds as a starting point. Think of a tic tac tow game. Each line represents a third in your photo. Some cameras have a grid built into the view finder or live view function. This is a handy tool for lining up your shot. You will want to draw attention to your subjects by placing them in the third. I like to line up as many things in the third as possible.
Most of the time, I don't completely nail this with my original shot, so I'm always looking to crop my photos to nail the rule of thirds. Use your cropping tool to experiment until you get your photo just like you want it.
Don't forget to straighten your horizon first, like we talked about in Photo Tip #1. Next, crop to the third. Have fun practicing! Keep those photo questions coming!