Anger Management

I've notice the volume in my house seems to be really high. The kids are constantly yelling at me or each other when they get frustrated or angry. When it comes to our kids, Mark and I have not been the best example at keeping our voices down. I'm trying this new thing where when one of the kids raise their voice in anger or frustration, they have to pay me with a toy. To earn the toy back, they have to do some extra house work or help me in some way. I too am trying to stay calmer and keep my voice at a normal level. If I raise my voice, I pay whom ever is at the other end of it 10 cents. This means I'm paying them for their misbehavior. I'm not sure if this is wise. At least it gives me an extra incentive to keep calm because I do not want to reward them for misbehaving. Anyway, I have collected many toys and I mean many. I was starting to believe this wasn't going to work as none of my kids have wanted to earn their toys back (They have way too many toys). But yesterday as Kenny was playing the Xbox 360 (finally not grounded from it), he came down stairs and as calmly as possible told me that I needed to make Carley stop playing because she was going to make him yell and he didn't want to lose anymore toys. A break through!!!! Normally he would have yelled and used physical force on Carley to get what he wanted and then yell and fight with me because he would be getting in trouble. I just couldn't believe it!! Latter that day, they all started earning their toys back. Can you say progress?!

Please enlighten me.... what works for you?