>>3360858>How do you fight the dreadful feeling that it's all been done before?By realizing that it hasn't. Even if you're directly copying someone else's shot, that shot hasn't been taken *by you* before. There's plenty of room for originality even in that. Think of how different "Hurt" by Johnny Cash is from "Hurt" by Trent Reznor--even though it's a cover, Cash really made the song his own.
If you're really worried that your work isn't sufficiently original, try this: Creativity is a skill you can practice just like any other. Force yourself to come up with a new idea or a new take on an old idea every day. Try to do that every day for a month. Even if you don't shoot the ideas, keep them around for when you're feeling in the mood to try something new. The more you do it, the better you'll get at coming up with new ideas.