I started a cafe while I was in college, which is still in operation today (4 years later). I no longer own or manage the business, but it's exciting to grab a brew there when I visit my old campus.
Looking back, that cafe gave me a huge insight into leading a creative team-- we had 7 very active employees-- and taught me to to appreciate the less glamorous side of starting a business-- like staying late to clean up or restocking the shelves.