I've recently watched "Everything is a Remix" a documentary that points out how a lot of art isn't original and in fact been influenced by art of the past in one way or another. Yes, to an extent artists put out their own content, but I believe there is some truth in the documentary title that everything is in fact a remix in one way or another. This ties back to the process of design thinking where people come up with an idea, make that idea come to life, present the design to people seeing what works and doesn't work with the design and try again until you are satisfied with the results.
However, to come up with these ideas in the first place often takes brainstorming, looking for inspiration and collaborating with other people to truly come up with something that doesn't only appeal to your personal aesthetic, but also can be something others will appreciate as well. For me, I always turn to some of my favorite artists, blogs and musicians for inspiration when working on new projects and try to consider why they've succeeded and how I can take these inspirations and create something with that same impact putting my own spin on it.
Sometimes I think people get too caught up in being "original," when in fact, nobody is truly original. People can only produce things that can embody their own personal brand, but in one way or another, they have probably been heavily influenced by something or someone else on the way.