IMO the best way to become a better coder is to maintain an open source project. Even if you never get a single Github star (just don't mind the stars, really)

IMO the best way to become a better coder is to maintain an open source project. Even if you never get a single Github star (just don't mind the stars, really), you will try to keep to current standards, and you will learn SO much about the traits of good software. This will also enhance your self confidence, rid you of the backseat coder mentality, and gain recognition by co-workers/clients.