Choosing what is for dinner

How do you decide what to eat for tea (or dinner)? How easy it is to get into a routine of Fish Pie on Tuesdays, Spag bol on Wednesdays etc.

I need to work out how to be creative with our daily menu, that doesn't mean spending all day preparing it and increasing the weekly food bill.

Someone ought to create a menu generator - select all the meals you like (and can cook) and it then generates the weekly menu.