Zero.
By taking a year and a half off after high school then not having a clue what I really wanted to do when I entered college. I entered college in the Medical Lab Tech program then switched to Liberal Arts (since I didn't want to have to draw blood) then decided I would like to have my own store (filled with items for dogs: food, treats, toys, etc.) so I switched to Business Administration with a concentration in Small Business Management. THEN I realized that I would love to show people their babies when they're pregnant, so yeah.
Plus, it's not necessary to have a degree to start a small business. My dad never got one and his business has done just fine for the past 15+ years.