Some example images to illustrate photo techniques
As requested, here are a few tips for getting better photos (gleaned from many sources).
Think about what the actual subject is that you are attempting to capture. Focus on that. Eliminate anything that doesn't help to get your point across. Think of focusing on the subject as getting to the point you want to make. Don't be afraid to get close (but do be sure that you have your subject in sharp focus).
It is easy to be overwhelmed by too much of a good thing. Flower beds tend to be too much info. Closeups of specific flowers, arranged for composition, will have far great impact.
Look for natural frames for your subject; they are everywhere!
Although usually, you want to avoid powerlines and messy fences, in certain situations, they can add dimension, perspective, interest... In other cases; they are best left/cropped out.
Rule of thirds (look it up), means you don't put your subject dead center and your image should have sections that the subject bisects.
Light is different at different times of the day. Usually, mid day light is harsh, throws distorting shadows and causes glare. Whereas, the slanting light early and late in the day, is most of the time more pleasing to the eye.
When photographing motion, leave room in front of the subject (more than behind) for the subject to move into. When you center a moving object, it makes it seem more static.
Portraits are usually most attractive at a three quarters angle. This angle hides many details that people object to seeing in photos of themselves.
But, the best photos of people are usually spontaneous and unposed. Still, consider the light source so that their faces are lit and shadows aren't on them.
Candid photos are the most fun to take, too. They have humor and surprise going for them.
Scenic shots should have a subject, too. Look again for shapes that are interesting.
Light is an amazing thing and creates fascinating images if you look for them!
Exposure requires learning the settings on the camera. You don't want images that are washed out.
Depth of focus is another issue. Macros are best with only the subject in focus and everything else blurred. But, scenery should be in focus from front to back so that the eye can see the details at each distance, although sometimes a certain amount of blur (intentional) does give the image a dream or nostalgic effect.
It is possible to create a black or contrasting background by putting the subject in front of a white or dark (shadowed) background. Use a doorway, window, sky...behind to set off the subject.