In our house we always work a little better when we are tracking behavior. If we write down points for all the good behavior and comment on the bad we generally have a better time all around. I have read a lot of things about how children with ADHD tend to respond more favorably to positive reinforcement than negative reinforcement, so we developed this point system.
We have been using this method since December last year and it has been great. The best method for the environment would be to print one and laminate it, then use a dry erase marker. Click on the picture to view and download the PDF.