I struggled with this for years. I solved this problem with one simple rule. I don't allow myself to talk about what I am planning, or doing, but only what I ha

I struggled with this for years. I solved this problem with one simple rule. I don't allow myself to talk about what I am planning, or doing, but only what I have done. It doesn't have to be a whole project finished, it could just be a part of it. So I could not say, "I'm working on this awesome RPG it's going to have blah blah", but I could say, "Last night I got this really cool feature working in my RPG map generator". etc.. That doesn't work for everyone, I know some people that are motivated by telling people what they are working on so they feel like there's pressure on them. But that's just what worked for me. The other thing that helps me is to set artificial deadlines with "cooling off" periods. So I plan a demo or a release for, say, the end of next month with the self-impose rule that no matter how much, or how little I've completed, or even if I miss the deadline entirely, the day after the deadline I will set the project aside for six months.