Those of us who cook regularly know that sometimes we end up making too much food. This is not always a bad thing, sometimes we do it on purpose to enjoy leftovers the next day.
If you cook just for yourself, this doesn't need to be a problem. There are very few one-person recipes in books, magazines and websites. Most recipes are created with 2, 4 or more people in mind. However, adapting them to individual portions is easy, just divide the quantity of each ingredient. If this is a little too complicated, don't worry. You can fill preserve jars to have individual portions ready in the refrigerator. Keeping food put away like this makes it easy to transport, making it the perfect lunchbox for work.