KISS: Can you change the camera angle to simplify the photo? Cropping?
Rule of Thirds: Separate your photo into thirds from left to right and up and down. Place your main subject at a junction of lines. If doing a landscape, have the horizon 1/3 from the top if the foreground is important and 2/3 from the top, if the sky is fantastic.
Lines: “S” lines (road, fence, river), or diagonal lines lead the viewer’s eyes into the photo.
Balance: No two separated subjects in one photo. The eye moves back and forth disrupting the composition of the photo.
Frame it: Frame a subject with trees, buildings, anything that will act as a frame making your subject important.