I have the exact same problem. When I know what needs to get done, even if it's tedious, it's not so bad to put my nose to the grindstone and work through it. But when I'm not sure how to approach a task, suddenly every distraction in the world is more appealing.
You often see the suggestion to break up big tasks into smaller, baby step chunks to avoid this analysis paralysis. Doesn't help when I'm not even sure what to do yet.
You often see the suggestion to break up big tasks into smaller, baby step chunks to avoid this analysis paralysis. Doesn't help when I'm not even sure what to do yet.