A source of controlled heat is handy for things like cooking and boiling water to make it safe for drinking. One of the simplest is a "Soda Can Stove" which can be made with simple tools and two empty beverage cans. It uses alcohol for fuel, is very light weight, and can easily be made in the field. Like most things it takes some practice to make one well so now is the time to learn how and to make a few to hone your skill. There are several designs and variations as well as some accessories that you can make.
Google "Soda Can Stove" and look at how they work and how various people make them and then decide on one to try. Make your own then fire it up and cook something. I made my first one from two Pepsi cans with nothing but a Sharpie marker, utility knife and an ice pick I then used it to fry an egg and boiled water for a cup of hot coffee. I learned from that one and made a better one with the help of a pair of scissors. I am still making them and trying different designs and sizes and the more you make the better they are.
So develop your skills now because you never know when it may hit the fan and you will need them. This is just one skill of many you may need. If you have a simple skill building project to suggest start a new thread using a title similar to this one to make it easy to search for and perhaps we can build a library of skill building projects.