I always keep ripe avocados and bread wraps in the fridge so I can take any small amount leftover meat, ground beef, chicken, pork, and make a Mexican meal out of it for me and hubby, with guacamole, and some cheese.
If it was just me alone ( almost never) I would make a big salad with egg, avocado, cheese and any leftovers.
Also, I always have 1 or 2 entrees in the freezer from my local catering place, if I really don't wanna do anything!