Tuning your own skis is really not that hard and once you get the hang of it it can become quite enjoyable. First thing you should do pick up a few tools and wax. There are a number of different kits out there but we recommend the Dakine Tune Kit. It have everything you need to get stated (except for an Iron). Then watch some video on how best to do a tune. We attached a good one above.  We also recommend that you watch Doug Coombs, Quick And Painless Ski Tune. Tuning your own gear will not only help you keep ahead of your buddies it will also keep you mindful of the state of your gear.
