Balance your shot with gridlines: Turn on the camera's gridlines to help frame your shot. The series of lines on the screen are based on the "rule of thirds." Place points of interest along these where the lines intersect. It makes a more interesting photo.
Focus your camera: The pictures you take on your phone should have an obvious subject. Adjust where you want your camera to focus, open your camera app and tap the screen where you want to sharpen the view.
Focus on one subject: Many of the best images include just one, interesting subject. Ensure to focus the camera on your subject -- that'll help to ensure that it's focused and the lighting is optimized.
Make use of negative space: "Negative space" is the areas around and between the subjects of an image.