Now here is a nice advice on discipline, that I read from a parenting website:
“A fresh twist on discipline: the token economy. Make two lists, one of things your child is fond of doing and another of things you find yourself nagging your child to do (or not do). Show him how every time he does something on the nagging list, he gains a token to do something on the fun list. You can assign relative values, so that, say, playing with a friend is worth one token while going out for ice cream is worth five.”
This can work in our case, I think. I am going to give it a try to see.