There are quite a few recipes in the book, many of which only take minutes to prepare. Another great source is
Linda's site
I think shopping is much more important than anything. Having lots of legal stuff - meat, veg, cheese, salad ingredients etc - in the fridge so that you can just grab some stuff and cook makes it easy. Cooking a steak, a piece of chicken, a chop or some fish while boiling up some veg only takes minutes, stir fries are also quick and easy.
You don't have to do major planning to cook ahead. There are also lots of times when it's very easy to cook more than you need and refridgerate or freeze some of it for another time. Don't cook 3 chicken drumsticks for example, cook 30 of them. It doesn't take any longer. Put some in the fridge for the next few days, and freeze the rest. Ditto with anything made from ground meat - I made Turkey tacos last night, but with about 4 times as much ground turkey as I needed. Most of it is frozen now and there for a quick grab some other time. Ditto with bolognese and lots of other things.
For lunch I find that making sure I have things like tins of tuna, frozen shrimp, avocado, salad leaves and stuff like that always available makes it easy to rustle up something quick and filling.
Just make sure your cupboards are full of good stuff that's quick to prepare and you absolutely won't need ready meals.