Rewarding kids with things they get to do instead of things they get to have. When they do something good, they pick from the jar and get things like to stay up a little later or play outside a little longer etc. Cute idea!
As soon as your kids are capable of doing jobs, take the time to teach them to do the jobs and then gracefully hold them responsible to follow through. (In Montessori we say: "Help me to do it myself.")... I need to remind myself of this all the time!