Meal preparation can be a real time suck and, accordingly, it is important to find shortcuts. One thing that I do is to always prepare much more than I will be using for a specific meal. In fact, shopping at Costco necessitates cooking much more than I need since quantities are large and I don't want the food to go to waste.
For example, you can steam a large pot of green beans, then use them in any number of ways:
(1) Fry up a little bacon, remove the bacon to a paper towel and pour out the grease; in the same pan, saute the green beans and finish with crumbled bacon. Next day:
(2) Make a salad and use green beans as part of the salad. Third day:
(3) Melt butter in a saute pan, toast up sliced or slivered almonds in the butter, add the green beans to heat through and blend flavors.
Another example. For SuperBowl Sunday I made Chicken Tandoori and Israeli Couscous. On Monday I posted the recipe for the Tandoori Chicken and reheated it for my lunch. On Tuesday I cubed the cold chicken, added mayonnaise and a few other things I had on hand, and had a delicious Tandoori Chicken Salad for lunch. For supper I roasted up rack of lamb and reheated the Israeli Couscous.
See what I mean? Cook once... eat often!