Recipes to master

I am a lover and collector of cookbooks. The irony is not lost on me that I have literally boxes of cookbooks, but I don’t use them too often. Given that I’ve been baking and cooking since I was eight, you would think I would have mastered most of the cooking basics in these books. But I still have a few recipes I really need to master.

Pot roast – Every time I make pot roast, it ends up tough. Blame it on me not eating beef for years.
Steak – Same as the pot roast, I just can’t cook beef!
Omelets – I’m a pro at turning omelets into scrambled eggs. They start out well. They don’t end well.
Marinara sauce – My current marinara “recipe” is opening a jar. I would like to start a garden wherever we move next, and a good tomato sauce recipe is necessary when you have fresh tomatoes.
Biscuits – Any Southern cook worth their salt has a go-to for classic, fluffy biscuits. I’m still looking for my favorite one.
Do you have any good recipes for these? What recipes are you trying to perfect?