I am always looking for the best way to keep an edge on my various blades, from those in the kitchen to those I have for camping, etc.
I have tried 14" stones, electric wheels, ceramic bars, etc. The most effective (read easiest to use for the fastest results) have been one by Fiskars and a new one, for me, by Smith's.
The Fiskars unit is ideal for camping, etc, as it is small, held between the thumb and forefinger and the knife is pulled through the sharpening area. This unit is about 3/8" thick and perhaps 2" square. There is a course side and a fine side; the sharpening done by small ceramic rods. Unfortunatley, two of the bars are now broken and I can not find a replacement at the Fiskars web site.
Small size, great results, I highly recommend it.
I just purchased the Smith's, a handheld bar based on diamond dust(?), $20 at REI.
I am impressed with how quickly you can put an edge on a knife with this, it is fast and easy to use.
Putting a fine edge on a good knife should take time and be done prior to the need.
Both of these sharpners are fine for use at home or in the field.