Controlling Social Anxiety
Personally, the system (pen, paper and coin back then) helped me with controlling my crippling social anxiety, which was a very huge milestone for me. I couldn't even talk to people at one point (had to write on a notepad, tear the page and hand it to them).
So one of my goals was to reduce my panicking when trying talk to strangers. The thing is, that was a large goal for me. To-do lists or schedules in this case wouldn't actually do me any good since I would just cower away anyway.
Instead, what I did was, every time I tried to walk to a stranger and strike a conversation, even if it didn't go well, I would reward myself with points. Summoning the courage to try is what I call a Small Win.
One thing I noticed was that after every few small wins, one unexpected good outcome would happen. If a good outcome happened, I would multiply my points (using coin flips again). I call this Achievement in RioFolio.
For example, seemingly out of the blue, my fear of talking to strangers went way down (in reality, it was reduced bit by bit with small wins). Another example would be getting an interested prospective client during a cold call.