When Mark was a teenager, his first job was actually his own start-up business doing car care and detailing. He would leave flyers on the windshield of any fancy car he saw and over time, he developed a loyal customer base. He'd wash their car every week and even go so far as to clean between all the spokes on the wheels with a toothbrush. He was so successful that he even employed a friend to keep the business going while he was away at college.
What did all this teach him? Always use the toothbrush. Get gritty, get after it, and just hustle.
