What is your hat size? As a start up small business owner you may have to wear more than one hat, maybe even at the same time. One way to know which hat fits you best is to understand the start up jobs that need to be done. When you know the job it's easier to determine if the hat that goes with it is the right size for you.
Have you ever worn a hat that does fit you just right? It's generally pretty obvious to everyone around you even if you can't see it.
For the goals you've set for your start up business define the skills and attitudes required to achieve them. Determine what the hat you'll need to wear looks and fits like. If it doesn't look good on you, find some one or some resource that will look good wearing it.