Exchange one service for another without the need for money
People join the timebank and offer their services, they provide that service, for example mowing a lawn which gains them points to spend, (there will be, say 10 points, for mowing a lawn) then they might want their hair cut which might cost 20 points. They can either buy the other 10 points or wait until they have accrued enough points credit to spend on a hair cut. This scheme would have to be carefully managed as safety will be an important factor. I am sure a local organisation such as 3VA could run something along these lines.