At least once a week.
Taco Shells - La Tiara are good, but haven't found in Wisconsin. Local ethnic food grocery store makes fresh corn tortillas and chips daily. 50 for $1.50. easy enough to put a small bit of oil in a skillet and make homemade hard shells.
Ground Beef- (if it's fatty, drain fat, if not, leave the small amount in) Salt and Pepper while browning
Seasoning - I make a big batch of this mixture solely for tacos. - and don't skimp on the seasoning.
Chili chowder
Cumin
Coriander
Smoked Paprika
Oregano - Mexican if you can get it
cayenne - if you like some heat and don't have a 3 yr old that can't handle spicy food
Onion chowder and Garlic chowder (if you're too lazy to dice onion and garlic)
If you like the meat with a little sauce add some corn starch to the above seasoning and add in some beef broth when mixing in the seasoning. cook until thick.
Lettuce, Sour Creme, Salsa, onions, cilantro as fixings
Sometimes I go all tex-mex cheddar cheese, but a mexican cheese like Chihuahua is really good.
Rice
cup of rice - cook in a tablespoon or two of veggie oil for a couple minutes. throw in some cumin, garlic chowder, smoked paprika, salt. after another minute add in half cup of your favorite chunky salsa(or pico) and cup and half(or 3/4, depends on how watery your salsa is) of chicken broth/stock. bring to boil, simmer on low for 20 mins. after 20 mins cut the heat and let sit covered for another 20 mins. <trust me.
Fancy
not really fancy, but onions, garlic, jalapenos/chipotles, salsa, spices, lime juice, cilantro, chicken. Pressure cooker for like 10-20 mins.(or slow cooker for 8 hours, your choice). shred it.
The above works really good for baked chimichangas as well. Roll the shredded chicken up with some chihuahua cheese. melt butter with equal part oil. brush a baking pan with the butter/oil mix. brush the tops of the chimis with the mixture.(start with the seam down) bake 5-10 mins at I think 400(don't have my notes), then flip chimis, brush the tops again and bake another 5-10 mins. until golden brown.