Photography is all about inspiration. A good way to to freshen up your routine is to check out what other photographers are doing. Here are a few people that I follow to do just that.
If you're looking for what a theme can do for your photography brightong's feed is a great place to start. All of his photos are treated with an orange and blue tint and feel very curated.
Julian appears to live the life. Traveling around the country, going to exotic locations. He takes great photos and subscribes to the same photo philosophy I do. "If you want to be a better photographer, stand in front of more interesting stuff."
Minimal photography can carry a heavy voice. Iron & stone has some amazing examples of just that. Great portraits, minimal clutter and photography fundamentals set them apart from them others.
Sometimes you just need a break from reality and David Chatsuthiphan delivers. Living in Hawaii makes for some great photo opportunities. Feel free use his shots as inspiration for your next vacation photos.