If you struggle with never being satisfied with your progress or performance anxiety about whether you can complete something keeping you from the fun of even starting, I highly encourage you to analyze your mindset. Also, consider doing what one of my time coaching clients successfully put into practice last week:
When my first book came out, I noticed I was mesmerized by any training that said "book" and "success." Learning isn't bad, but when it keeps me from actually focusing on what's most important for preparing for one of my books to come out or classes to start, there's a problem. I'm in the process of discovering how I can take my own project and time management practices to the next level.
When it comes to managing your time, many people feel like they have a crushing number of requests coming at them that make them a victim to their circumstances. "There's always too much to do. Everyone just keeps piling more work on me." Sound familiar? If so, you're not alone, but you should stop playing the victim and own the situation.