Brown ground beef thoroughly and then drain. Add back to pan with 2/3 cup water and taco seasoning, over low to medium heat, and stir while simmering for around 4 minutes.
Line up your taco shells in a baking dish, and portion out your meat into the shells.
Top the meat with your desired amount of cheese.
Bake in a preheated 350 degree oven for 10 to 15 minutes, till your taco shells are slightly toasted, the meat is warmed through, and cheese is all gooey and melted.
Top with your favorite toppings and serve!