Ask HN: How do you overcome the fear of starting?

I recently decided I wanted to start a blog about something I am fairly knowledgeable about, and then possibly take that and develop it further into either tutorials or an eBook and video guide. While browsing Hacker News, I learned about a guide series called Authority by Nathan Barry, which I believe walks through how to create and market an eBook/series of this type.

Disclaimer: I am NOT AT ALL affiliated with this program or Nathan, and have not even purchased or started the guide yet myself.

I've been struggling to get started. The best I've done recently is start creating an outline of topics, starting with the Intro and why someone would want to follow along, but I haven't hit the computer to actually start. I figure others also struggle with this type of thing. Are there any techniques you use to push yourself to overcome that fear of starting? I KNOW I should just pick one of the topics I've outlined and just do the damn thing, but it's easier said than done.