Chuck meat in SC. Switch on, walk away.
Don't use frying steak or anything that would be edible from a quick fry in a pan - get oxtail, chicken thighs, any meat on the bone, stewing or braising steak, things that have inherent fat and connective tissue. Chuck them in with a small amount of boiling water and whatever flavourings you want, stick on low and leave it. About 45 mins before you want to eat, take the lid off and switch to high, as it'll boil some of the liquid off and concentrate the flavours if it's too watery.
Curries are improved by the addition of some fresh garam masala, a blob of chutney and one of tamarind paste towards the end, then switch off as you chuck chopped fresh coriander stalks, spinach leaves, etc, in there to wilt/soften as you sort out the rice or bread.
Mince based things are improved by adding lots of tomato puree rather than just a tin of chopped tomatoes. And Bisto at the end helps if it still tastes as though something is missing. Don't bother SCing Quorn - it takes more effort to make that stuff taste palatable than it's worth.
Sausage casserole - brown the sausages first and don't forget the tomato puree.
Make sure onions are actually cooked before you add liquid.
It's a different way of cooking, it's not inherently better or worse, it's just different.