1) If you can't focus on a project longer than two days, then pick a project you can finish in three days. Honestly evaluate how big such a project can be. I also see this as students learn to code. They learn the basics then think they're going to dive into a 2000 hour project. Instead, you need to ask yourself "what's the biggest project of this type I've ever finished" then add 50% to that. Like an athlete, you need to build up the endurance for your self-motivation to survive longer and longer projects. The payoffs are bigger but your human brain needs to trust that a payoff exists based on past experience.
2) I prefer not to talk about my future dreams for a project. What happens is I get enjoyment out of talking about what I "will" do, but without actually doing it. Then if I ever finish the work, I get less enjoyment because I already talked about it. In this way I'd be stealing enjoyment from my future self! An exception is advice.