I cook as many of them as possible. The mid-day (ish) meals are lighter than the others and consist of sandwiches or a baguette. If you are planning to work out, you could make your next days lunch/brunch while your dinners/suppers are cooking or being prepared.
Being efficient with ingredients is a plus. I might have chicken breast fillets with something for dinner. I'd also stick a few extra in and cut/slice them up for salads/pasta lunches the next day. Pork is another great one for that.
I watch a lot of cookery tv shows and I've noticed that the majority of them are targeted at middle class people with large kitchens and the time to browse specialist markets.
When was the last time there was a genuine cookery show targeted at the 'meal-maker' in a family household with average-to low income? It would be a great way of improving the quality of the food that children eat, a great way to get parents and children interested in 'cooking together' and a great way of explaining basic cookery skills (folding, blind baking, sealing etc) to those who can't afford cookery classes or who didn't take it as an option in school.
Stick it on in the afternoon-to-evening slot on BBC One or something and I reckon it would do really well. Its all very well Nigel Slater telling us to use 'left-over ingredients' but hardly anyone will have a left over stash of ginger, brown sugar, a herb garden, double cream etc. It just seems horribly impractical.