For the frequent honing required to keep your knife blades realigned (see below), purchase a high-carbon or diamond sharpening steel. The honing surface should be roughened by fine vertical ridges and a guard on the handle will protect your fingers from the moving knife blade.
Eventually your realignments with a sharpening steel will wear away the original bevels on the blade and it will require regrinding. For this task you may want to take your good knives to a professional. But if you like DIY you can learn how to regrind them—with practice, you can regrind a knife in less than 10 minutes. You will need an oil or whetstone with both coarse and fine sides. The finer the grade of stone, the more expensive it will be.