Safety, performance and overall enjoyment all come to mind. The majority of ski tuning can be accomplished at home by even marginally gifted do-it-yourself-ers. Daily or weekly wax applications is a fundamental ski-health practice; just like taking vitamins. Edge sharpening, with the correct tools, is much easier than you might think. Major edge or base repair might be the best example of when you should seek professional help from your local "Ski Doctor". If you are not sure, too busy, or just plain afraid of it, don't worry. Find a ski shop you trust and give them plenty of time to get your sleds back in shape.