I find myself saying "Do you want to go to your bedroom? Because I'll put you there if you keep being naughty!" and DS simply says ok and off he goes. I mean, why wouldn't he want to go there - it's like a toy shop .
I also say "Are you a baby or a big boy?" when trying to convince him to do something suitably 'big boy'. He originally fell for it and would do whatever big boys do, like eat his carrots etc. Now he just chops and changes between big boy and baby to get out of doing whatever he is meant to be doing..