This is one of my best healthy eating and cooking tips. Every time I cook dinner, I want the time and effort put into it to last. So I double my recipes in order to have enough for dinner that night and leftovers for at least the next day's lunches.
When done cooking, portion out your meal into dinner dishes and into lunch containers right away and then you won't have to take the time to dish it up for lunch in the morning. This means you're more likely to eat the healthy homemade meal you cooked even when you are short on time.