I was recently referred to a very helpful book... It's called The Kazdin Method for parenting the defiant child without pills, therapy, etc.... Dr. Kazdin's book tells all about the defiant child from young ages through teenage years... and how yelling, threats, punishments, etc never work. My 10 yr old girl and 12 yr old boy are costantly fighting with each other... it's as if they really hate each other... and my 12 yr old boy also has ADHD, is on meds and has anger issues (he probably learned from us unfortunately). I try so hard to stay calm, ask nicely, etc but he refuses to listen to me at all any more.
Anyway... Dr. Kazdin's book has a 20-minute DVD with it and he writes about how to use "positive opposites" to get your child to cooperate and he also gives examples of rewards charts using points and how to use them.
I've only read half the book and need to finish and put these tips to use, but it sounds like it could really work. He recommends not yelling, punishing or taking priviledges away... rather, "catch them" doing good and be generous with points.. at least in the beginning... to get them to try to do the things you want of them so they can earn points ... small points can be redeemed daily for those immediate needs....like renting a movie or having desert or candy.... or they can save their points up for bigger rewards like a sleepover, a fishing or camping trip, a toy or a day alone with mom or dad.
Again... I'm still reading the book and have yet to put this into play at my house, but I'm going to try it. I really don't know what else to do and threats no longer work on my son. He just doesn't respect me or care any more. I'm really hoping that giving him something to work towards will help turn things around.
Hope this helps. D. N, Clarkston, MI