We also plan our meals for the week on Saturday and shop on Sunday usually. We also decide who cooks when at the same time. Usually on Thursday I go back to the grocery store to pick up a few missing items or produce that I want to be more fresh, or to the meat shop for fresh chicken. We usually cook 5 or 6 nights a week and either eat out or go to his parents' place on the other 1-2 nights.

Usually we do a combination of:
one meat dinner (usually beef)
one or two chicken dishes
two vegetarian dishes
one or two pasta dishes
one slow cooker meal
one fish dish

Of course it doesn't add up because the chicken can be a slow cooker meal etc.

We sit down with the cookbooks and make our picks and write the grocery list. I'm thinking of getting our "successful" recipes on index cards or in some sort of a program to be able to quickly prepare a week of meals if we're too busy to do it from scratch on a given weekend.

The slow cooker meal and the pasta dishes usually yield lots of leftovers.