Dear little Sim,
Please don't cancel your actions. They are there for a reason, and it's to ensure you stay alive. Yes, your toddler us cute and you would like to spend more time with him, but you are on the edge of starving to death, so please stop cancelling my orders to eat your dinner. And then go to sleep, instead of playing guitar all night long, otherwise you're gonna pass out before you get to work.
Your frustrated watcher, who is tired of going out of her way to keep your foolishness from killing you and is tempted to let the natural selection to have its way. Remember, you are not my only sim.