Do Mise en place. Holy shit does cooking get a lot easier when you read the ingredient list and interpret "1 onion, finely chopped" as literally "a small bowl containing 1 finely chopped onion before you start" and not "1 onion, which you should finely chop when you have the time". Also it lets me psychologically separate the prep from the cooking: right now I've got everything I need for dinner in the fridge; with that done actually making dinner will take 5 minutes.
Cooking is now way less frantic and I therefore do it more because it's less stressful