(1) Taco Cheese - you can use any kind of cheese you prefer, but I like to buy the pre-mix shredded taco cheese for my mexican dishes.
(2) To easily flip the tortilla - when one side is cooked, place a large dinner plate on top of the tortilla and carefully pick up the fry pan and turn everything over onto the plate. Then simply slide the tortilla off the plate back into the skillet to cook the second side. Using hot pads, this is an easy way to flip the whole tortilla.
(3) Adding the sour cream to your eggs makes them fluffier when scrambled.