Ran a successful scam in highschool to get weed money
When I was in highschool I was on a sports team and they would have all athletes go door to door selling "booster cards" (kinda like a coupon book for local businesses). Our coach would give us each a stack of 20 or so and we were expected to sell 3 or 4 to help raise money for our team. The thing was, they never collected the unsold cards when it was over. So junior year I got the idea of selling the extra ones and pocketing the money. It worked so well my two good friends started helping me and I think we even charged some people $20 instead of $10. Me and my friends spent all the money on weed from what I remember. Senior year they must have caught on bc they started requiring us to turn in the extra booster cards. It was an awesome grift while it lasted.