I can relate completely. After a decade and a bit hammering away at projects, and probably tens of thousands of great ideas in my head that never happened... I

I can relate completely. After a decade and a bit hammering away at projects, and probably tens of thousands of great ideas in my head that never happened... I now, regardless of other work, pick one task for the day that I intend to complete. Usually work related, sometimes related to an ongoing project at work, sometimes a personal goal at work, sometimes something completely different - but I set it, and finish it, at almost all costs. It doesn't have to be big... but you end the day with a sense of completion that you set out to do something, and did it... and at the end of the week, you did 7 things. This becomes natural, and feeds on itself, making you feel better and better and less stressed out about not completing things. As time goes on, I notice I am just naturally getting better and better at picking what those goals are until they become mostly strategic and to my benefit.