If it's going in the freezer, it should be labeled. (It doesn't always, but it should.)
In the fridge, it will be eaten within the week or tossed.
Now, as I try to cook up the week's (or some percentage thereof) meat on the weekends, we tend to have a lot of "leftovers" in the fridge at the beginning of the week and fewer by the weekend.
I still end up finding things to throw away that have been in there far too long, despite my efforts. (Because I'll inevitably miss something on clean-out day.)