Did you see all those instruct-ables which require sandpaper or some pottery? Me personally don't have those laying around alle the time (e.g. at work, at school)
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
Good scissors have at the back an area with narrowing metal.
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...