Rice - whether in a rice cooker or on the stove top, I just follow this ratio:
Jasmine - 1 cup rice to 1 1/2 cups water
Basmati - 1 cup rice to 2 cups water
It doesn’t matter what you use for your “cup” measurement - any small bowl or container will do as long as you use the same for the rice and the water.
Annoying recipes that call for 1/2 a chopped onion, or 1/4 cup, etc. - chop up the whole darn onion and whatever you don’t use, put in a ziploc and freeze indefinitely. Pull it out for omelets, stews, whatever. My eyes are terribly sensitive to onions and it’s so nice to pull out a chunk of frozen onion and toss it in the skillet without having to chop!
I prefer to bake fish uncovered in the oven rather than wrapped in foil because I like the top and edges to get a bit crispy. After baking, I often broil the fish on high for 2 minutes to crisp it.
When baking plain chicken breasts, I prefer to wrap it in a foil pouch or cover the dish with foil - keeps it from drying out. A dash of white wine or lemon juice, or any salad dressing and herbs adds a bit of flavor and moisture. However, if the recipe uses a good amount of liquid / sauce, I don’t worry about covering it.
I’ve also just learned that if you want to use dried beans and didn’t have the foresight to soak them overnight, you can cover them with water, and microwave them for 15 minutes on high in a loosely covered dish! Tried it the other day, worked a treat!