Even when you ship a startup product fast, it still takes too long. There are a few ways to mitigate friction and go fast. 1. Get a team, not a cofounder - you won't have to debate decisions or compromise your vision. 2. Make decisions fast - if you can make good decisions quickly, you may have what it takes to be a great founder. 3. Focus - yours and your team's attention on knocking out immediate goals. It's kind of like taking dangerous turns and getting around one at a time.
When I want to go fast, I think about speed. I've been looking at this board while pushing towards shipping my next startup product. If it works for me, it might work for you too. Go fast.