Knives are, by far, the most used tools in the kitchen. We rely on them to cut efficiently, cleanly and with a minimum of effort. This means that keeping them sharp is probably the most important bit of kitchen maintenance we can perform.
It may sound a little odd but keeping your knife sharp does not involve sharpening them very often. What you do need to do often (as in every time you use a knife) is hone it. This realigns the edge and keeps it cutting beautifully between actual sharpenings.