Apart from a freezer, another must I think for a solitary person, is most definitely a slow cooker. It is so versatile, I would not be without mine and I think that freezer and slow cooker compliment each other very well.
I 'roast' my joints of meat ie: beef and pork and they are always melt in the mouth. The added bonus is the meat juices that you get to make the most delicious gravy.
You can cut the meat into single portions and freeze the rest, ditto the gravy.
As for a glut of fresh, or even tinned vegetables, they can easily be turned into a soup or a casserole in the slow cooker, and again frozen.
The best thing of all is that a slow cooker is very cheap to run, and can be left to it's own devices.
One last thing Jenty, I discovered a book many years ago that I still use even though I am no longer on my own as it is easy to double up.
Check out "One is Fun" by Delia Smith. It is a brilliant book.
It is designed for the single person, and best of all, the recipes do not require silly amounts of ingredients ie: half an egg, nor do they have an endless list of ingredients. The recipes are lovely and well worth a look 