Look at your own photographs as often as you can to see the patterns in them and you will also realize the types of subjects that really interest you. Always be looking for ways to improve.
Read your manual, maybe read it again and keep it handy. Get comfortable with your camera before that “special moment” arrives. Today’s cameras are too complex to “know it all”. Practice – practice – practice.
Get very close to details in your subject. For example architectural or structural detail. This subject isolation can sometimes be more informative than the whole, complete subject.