There is a lot more to knife sharpening that you may think, it takes some knowledge and skill to hone a blade. However, mastering this skill only takes attention to detail and the right, if not basic, tools. If SHTF, it will be invaluable to have a sharp knife, or the means to make it so. The ability to properly sharpen a knife is a skill that every prepper and survivalist should have. You never know when you will need a good sharp knife, and there are many survival situations where having one could mean the difference between life and death.
You will only need a few inexpensive tools in your kit; a sharpening stone, good quality honing steel and a leather strop. There are also some great alternatives discussed in the below article, along with some techniques that will help you learn how to hone and maintain your blade.