One of the trickier things about photography is that our various skills and taste may develop at different rates, leaving images with a lot of potential that are held back by one specific issue. If you experienced this when you were still learning, now might be the time to take a look at your catalog and consider reviving old images.
Coming to you from Brian Matiash, this video follows him as he re-edits an almost decade-old image that had potential but a bad first edit. I think a lot of us have shots in our catalog that we messed up in the editing process for one reason or another that could still become great photos with a now more experienced eye. For example, when I was first starting out, my landscapes were generally composed pretty well, but I was fairly terrible at controlling the color in them and generally overdid it, making them gaudy and over the top. It's a great exercise, especially if you're sitting around on a rainy weekend with nothing to shoot and looking to create something, and it's also why I recommend keeping old images just in case. You never know what you might make down the line.