LANSKY......away from home....I use one of these
http://www.cabelas.com/cabelas/en/templates/index/index-display.jsp?id=cat20897&navAction=jump&nav Count=1&cmCat=MainCatcat602009&parentType= category&parentId=cat602009 and LOVE it....I feel like it sharpens it more so than 'ripping it' til its sharp...can do it rough with one side and finer with the other. I love it.......next 'stay at home' sharpener I get will be some sort of diamond sharpener