When the kids do their chores right away, with a good attitude and do them according to moms standards I reward them with a few points. They save these points and then at least once a week we open the family store.
Reward coupons for a reading reward chart. Make a chart for the week and decide on how much she needs to read for the day/week. When she reaches that goal she gets one of the rewards. Stay up 15 minutes later, more screen time, etc.
reward system based on 'real world' -- kids earn chips for good behaviors and chores, then turn them in for things they want. they also lose chips for behaviors that aren't acceptable. (this is the chart I created for my little nanny-kids)