[Rury]

I feel like understanding the psychological concept of flow and using it to your advantage really helps. The key really is to choosing projects/goals that will keep you in the "feel good" states. If a projects seems too overwhelming, keep breaking it into smaller more manageable chunks/tasks/goals and just focus on those for the time being.

That said, I'd also suggest perhaps looking at other factors that might be giving you headwinds. Almost anything that can affect your dopamine levels (drugs/food/sex), can subtly influence your motivation. For me personally, I feel quitting all sources caffeine/nicotine has improved my ability to remain focused on tasks.