We've just started with a tick list for the DCs - DD12 and DS8. This was following my being ill with tonsillitis for a week...when I finally left my sick bed I spent ages cleaning up after them. Sweet wrappers, crisp packets, etc, etc.
DS has taken to it with great enthusiasm and does his list every day. He has been rewarded this week with something he's been after for a while, but the reward won't always be something extra - some weeks it will be simply an extra pound on his pocket money.
DD, on the other hand, is resisting at every turn. She leaves a drift of mess behind her, and hasn't quite grasped that she needs to do basic things or else her pocket money might start being reduced.
We started them both with two tasks: make bed, put dirty laundry into the washing basket. The plan is to add extra tasks which will be age-appropriate.
DS has a couple of extra tasks now (clean out his guinea pigs and tidy toys away), which we talked about and he agreed to do. This week has been a little more of a challenge for him, but he's still going. I ask him how his list is going and he'll do the things that he has missed.
It's a slow process...and it's going to be an uphill struggle with DD, but I think we'll get there in the end. She hates mess and I can't understand why she is so untidy!