I have two things I tell anyone who asks me about writing. The first is that you have to write every day. Whatever it is your working on, even if it's writing in your journal, there's just no substitute for writing every single day. The ways this will improve your writing is immeasurable. And the second thing I always say is that writers need to finish what they start. Finishing is such a valuable discipline. Too many of us - and this was me up until a few years ago - are intoxicated with starting new stories, but we never finish them.