Keep very detailed notes on everything you do, and if you ever decide to start something new then archive your notes, digitize them if possible and keep them un

Keep very detailed notes on everything you do, and if you ever decide to start something new then archive your notes, digitize them if possible and keep them until one day you decide to return to it. If you never decide to do that then give them to your children, (or the world if you think it's that good) etc. As far as doing something and trying not to get to that point at all, focus on the one project until it's finished.