We have been doing the accountable kids program and we love it.  Every child has a board that has their daily chores on it, we have morning, afternoon, and night chores.  After doing their chores for 10 days they get a date with mom or dad (it doesn't have to be expensive, it can actually be free) bike riding, sled riding, an ice cream or movie together) 

They can earn special character cards for doing something exceptional, however they can't ask for it (For example when my older son told his brother he could have the last piece of cake, even though he wanted it), at the end of the week we have a special drawing with the character cards in a bowl and someone wins a small toy (usually from the 1.00 store)  

They can also earn the special priv. card.  This is a card that helps them with something that has been difficult.  An example of that would be when my 4 yr old kept coming out of his room every night with every excuse in the book, he knows now when he stays he will get a card on his peg in the morning and that will earn him 15 min. extra time up with mom and dad at night or 15 min of an activity of his choice (like us playing cars with him or a project)  You only use the card for a little while and then once they have mastered their problem then you just reward them once in a while with special character card. 

 Another thing they have to  earn everything so when they finish their morning chores they get a card from you that lets them earn time on the computer, tv time, outside time (whatever is a privilage to have)  The point of this is that children need to know that everything in their home is a privilage not a right just because they are there.  It has worked great for us, I will be glad to answer any questions, the website to check out is accountablekids.com, we found this at our homeschool convention.  A couple decided they were tired of so many chore systems that had failed them and they wanted something there kids could run, they wouln't have to run it for them.  The kids are responsible for their own boards, we are going to paint ours soon, I will post pictures when we do.

Angela