My problem is very specific, DS whizzes thru maths homework, and will do any amountof reading or drawing. But he HATES writing and he is supposed to do some daily.
I usualy say "No TV until it's done", but then DD suffers even if she's done her HW because I can't have TV on for her w/out DS seeing it. I know I'll be told to just keep him away from tv room, but if I physically baricaded him while DD watched difficult with little things to do like take a 3yo to toilet or cook tea DS is likely to explode and go ballistic, hitting, or destructive.
And no, he doesn't think, no amount of threats of consequences works to make him live anywhere but in the moment, so he's going to act on how he feels here and now, full stop.
I used to think DS1 was just "being a boy" but DS2 is sweet and does try to help others and for a 3yo has more self-restraint, DS1 is just a selfish prig, really.