[scobar]

Great comment! I'd like to add to the points you made based on my experience.

-To stay focused, I set and obey time limits on researching startup advice and studying the domain of my startup.

-Everyday I write in a journal, among other things, about one great decision I made the previous day. This has helped me to consciously make better decisions. Therefore, more often than not, I decide to act/build rather than just think about something relative to my startup.

-Fortunately I'm not a single founder this time, but I have been on multiple past projects. A great friend of mine from college has agreed to co-found my current startup with me. One of the most important advantages I've gained is having someone that I trust and respect who can discuss ideas with candor. Try to find someone like this, even if they're not your co-founder.