There's no need to buy new extravagant knife sets every time your blades start to dull. Instead, you can take care of the knives you have and prolong their lifespan. This video will show you how to keep them just as sharp as when you bought them.
The video above, from the How To You YouTube channel, explains everything you need to sharpen with a whetstone at home, and the best methods for doing so. Obviously, you'll need a whetstone (as well as a few other things), and you'll want to work near your sink or a bucket so you have easy access to water. Fill a container with water, then soak the whetstone in it until it stops bubbling. Inspect your blades for any trouble spots, and get to sharpening using the methods and motions described in the video, making sure to check your progress as you go. We've talked about sharpening knives with whetstones before, but this guide is a bit more thorough and the old video has since been removed.
How To Sharpen Your Knives [YouTube]