I'm sure there is an art to sharpening a knife but who has time for that? If you're disinterested in maintaining your knives, then check out the Smith's JIFF-S Knife and Scissor Sharpener, the name implies - it'll have your knife sharp in a jiffy!
Two crossed carbide blades form a 'V' which will cradle your blade comfortably. Then, three or four strokes and bam a sharp blade. A scissor sharpener is incorporated into the handle and compatible with both right and left-handed scissors.
As they say, a blunt knife is more dangerous than a sharp one. Sharpen up your collection in a jiffy, with a JIFF-S.