Sharpening scissors isn't exactly something you can describe to someone. You really have to be shown how to do it. There are places that will sharpen your scissors for a small fee. OR instead of this, just go get a new pair of scissors, unless your current pair of scissors have some sort of sentimental value.
The best way to sharpen your scissors is to use a round steel rod or even the round steel part of a screwdriver. Start sharpening from the pivot point of the scissors and then act as if you are trying to cut the round steel part of the steel rod.