The main object in a picture should be off-center, not in the middle. A tree limb extending across an otherwise vacant sky adds a stop for the eye and adds depth to the scene. Above all, do not take pictures of people staring directly into the camera. Prints should have visible detail in the large dark and light areas. Color, on the other hand, is usually best when you shoot with the sun behind you, or behind and slightly to one ides.
Overexposure is a major fault in color slides.
If proper exposure of light areas means that facts or other important details of the photographs will be too dark to reproduce properly, move your position or wait for better light conditions. Whenever possible, try to include some photographs of people or animals doing something. A set of pictures showing only dead fish or game, beautiful scenes, or still lifes rarely does the job. We prefer color photographs that are exposed perfectly, but if you have some that are exceptional but somewhat overexposed or dark, we can sometimes bring them out in engraving. So send them along, even though they aren't just right.