Swear Jar – Incentivizing good behavior
assemblymade.com
assemblymade.com
You could make a fair bit of money just allowing people to pre-buy a block of fines, then swear/smoke/turn up late all they like until it runs out. Might defeat the point of the jar, but you'd make a good profit!
[Edit: I'd have forgotten this long ago, except that I've worked with people who have that way of getting under one's skin.]
We made a rule, if you arrive late you invite everyone to donuts. It didn't work. Then we made it donuts + coffee. Boom it worked flawlessly. Every single meeting now starts on time. People make a huge effort never to arrive late and it's had a great impact on productivity.