Years ago I bought a vegan cookbook, which had week-long recipe plans in it. I'm not vegan, but without the "meat + sauce" or "meat + veg" options the recipes had to be so much more inventive. It gave me some good ideas, a taste for chickpeas, and a willingness to add beans to anything that looks boring.

A flatmate has a book called simply "Saucen" (German for "Sauces") which provides a good basis for many meals.