One of the problems in living alone is that it's hard to get enough variety AND small enough quantities of food at a reasonable price. Either one has to over stuff a refrigerator, or pay too much for the small quantities one needs. For example, I only need a tiny bit of celery to make a decent tuna salad for sandwiches. Yet, I always end up wasting food by buying too much to feed only one person.
What makes things worse is that it's so hard to plan my meals. I'm lucky that I can buy my lunches at the local supermarket and heat them up in a microwave oven. But this is not the healthiest thing to do, as I will always end up eating more than I should. In certain ways, this is a problem not unique to single people. Most of us are on the go, and don't have the time to do any serious meal planning. Given that my mother was a horrible cook, she was not the person from whom to learn either cooking or meal planning. This is where I wish they gave "Home Economics" to both boys and girls when I was of school age.
Over time, I may get the hang of things. But the one thing I am grateful for is the rotisserie chicken found at many supermarkets and warehouse clubs. A whole chicken can easily be made into 3-4 meals. And the trick is making at least one of those meals a lunch. Chicken Salad sandwiches are always a good way to use an "old" chicken. And I've done this more than enough times over the years.
Well... Enough for now. The pork tenderloin that's been in the freezer (and just thawed out) is finally ready to eat. It's enough meat for two people, but I can always use it tomorrow night - as long as I'm not cooking anything else....