Questions on Bad Habits

1. I spend too much of my time monitoring, reminding, and revoking the use of the computer. Is there a more positive, less "parent as the enforcer" way to handle this situation?
2. My 10 year old daughter is 'forgetful'. In other words, she forgets to do the dishes. She forgets that I had told her no TV today and asks her father, who lets her since he did not yet know that I had denied it. She forgets that she's supposed to make her bed. She forgets that she has to have a clean room before inviting friends over.
3. Lately whenever he doesn't want to do something, he becomes a "wet noodle"--just flops on the floor and refuses to move.
4. Bad Habits, how do you get your kids to quit?