Boiling pasta -- I use half a pot to a pot of water, depending on how much pasta, maybe half a teaspoon of salt, and a splash of olive oil. I don't want the pasta to taste salty, and the oil keeps it from sticking.
Frying eggs -- I love eggs fried in bacon grease. Otherwise I will use ghee, which doesn't burn. My parents say that frying eggs in coconut oil makes them taste like coconut, dreadful. :P
Cooking bacon -- I grew up making it on an iron griddle, which produced excellent bacon. Now we use the microwave.