Do you still want a quick and dirty way to sharpen you knife.
That's were scissors enter the scene.
During this proces; the scissors stay just as sharp as before.
Step 1: Finding good scissors
See that you can modify this angle to the size of your liking.
If you would like to chop wood with you knife you will probably need an angle of about 45Â°. If your going to cut wood, try to get your angle as small as possible...
Step 2: The Sharpening
Close the scissors till you get the corner you want. (see previous step)
Move it back and forward a couple of times,(note this is not sex) pressing it hard against the scissors. See that the angle between scissors and and knife is not 90Â°. I would advice an angle of about 70Â°.