I've posted this before - find it helpful to plan the category of meal for each day , rather than specific meals, and then have 4 or so dishes within that category for each season eg:
Sunday roast - pork, beef, lamb with trimmings
Mon - (easy).cold cuts with salad or veg or cottage or shepherd pie.
Tues - (usually veggie) rice or pasta
Veg risotto, veggie chilli, classic tom pasta, vegetable curries, veg lasagne, mushroom ravioli etc
Wed- oven tray bakes with either chicken or sausages
Self-explanatory!
Thurs - (veggie)
Chick pea casserole, gigantes plaki, lentil soup, bean burgers etc
Friday - fish
Salmon Japanese style, salade nicoise, cod en papillote, fish pie, fish cakes, fish and chips, etc
Saturday - fakeaway or takeaway
See Hairy Bikers for good fakeaway recipes, things like duck pancakes, curries, kebabs, etc
I find it must simpler to think "oh it's Thurs; therefore it's veggie" and be able to plan within that category rather than slavishly follow a set meal plan. It gives me the right balance of organisation v flexibility.