Hmm, also, writing can be an excuse for generating ideas! The obvious thing to do would be to wait for good ideas to come into your head, then write them up for the world to see. But in my experience, writing and having my writing read boosts my ego, which somehow encourages my subconscious to throw up ideas which can be written up to derive yet more ego boosts. It's a virtuous cycle. Which makes not writing because you can't think up any good ideas a vicious one.