Not really meal prep, but I found that the major step forward was the simple act of planning out the meals I want to prepare during the upcoming week beforehand. This allows me to just buy the stuff I need. I then proceed to cook one meal from my weekly list per day. Over the course of the months I got quite good at finding a mix between quick & easy recipes and more ambitious ones.

For all of this I recommend the Paprika3 app. It’s an invaluable tool for keeping track of recipes, planning meals for the week and even making a grocery list based on the planned meals. With a family, including small children this really cute down on the wasted time of making several trips to the supermarket.