It can be a small step
Too often we get overwhelmed with ideas of how we will build a business, and spend a lot of time planning and thinking and talking. The trick is to take the first step towards your goal. Something that triggerst a next action.
For example, I've been stuck on trying to figure out how to properly structure Selenko. Thinking about projects and clients, team members, services, etc., but ultimately I knew that I want Selenko to have a good web presense. So for me to take the first step towards getting the brand out, regardless of how the company is going to be structured, was to start working on the websites.
The moment I started working on the websites, and visually organizing those thoughts, I had some breakthroughs in my thoughts regarding the structure. I found my answers throught the process of moving forward, taking steps.
Stop thinking for a moment, and take that step.