Rule of thirds, imagine a tic-tac-toe borad on your frame, the points where the lines intersect are your "anchor-points" the place where you put your main subject.
Light, Early morning, right before dark, sunset, it gives photos a good color and a sense of depth and diemension.
Look for frames, doors, windows, peekholes, are good frames to put your subject in
Be aware of the background, you don't want a tree or telephone poles sticking out of someone's head, nor clutter, if your taking a picture in the forrest recompose moving up, and removing the clutter ground (twigs, straw, bushes, etc.)
Devolep a sense of place, if your taking portraits or traveling, instead of a walk up and shoot shot, look for bckgrounds that tell the vewier where you were.
"The name of the Game, is to fill the frame" - Rick Sammon
Kinda like removing clutter from background
Shoot from different angles, angles and veiws that our eyes normally miss, look up, down, left right etc.
Shoot shoot and shoot the more you practice the better you become, photography is a fusion of art and science, the art is envisioning the end result, the science is shutter speed, aperture, ISO, etc.
Keep me posted!