a couple good things to know based on reading this thread:
Yes, Freezy, you are a little over-zealous about waxing, but you are right, you cannot do it too much, I used to wax before everytime I skied, and I admit now I was a little over-zealous, but my skis always skied great.
Freezy, just keep in mind that when you start going out and buying different irons for different waxes to prevent wax contamination, then you definately need help (a lot of world cup tuners will have different irons and brushes).
Strode, the reason that holes in the iron are bad is that they ''grab'' moisture and can rust, and the last thing you want is rust getting into your bases.
Also, anyone tempted to use pure flouro additives, know what you are doing, to properly apply most of them, you need to have the iron super hot, and if you don't know what you are doing you can very easily screw up your bases (mainly seal the pores of the base).
Having a good variety of waxes will come in handy since the snow conditions are always changing so much, all temp wax only does so much.
A couple good money saving bits:
Buy your files at a hardware store, they are typically around $5, instead of $12-$20 in a ski shop. Most base cleaners are just acitone, and at a ski shop, a pint will cost $15 (give or take a couple), while if you go to the hardware store again, you can get gallons for about $10. If you are serious about waxing your own skis, buy bulk wax, you will save a ton in the long run. And if you think buying all the stuff and learning to tune is expensive, think about how much money you spend in 5 years on getting your skis tuned, in the long run you can save money, get a much better understanding of tuning and techniques, and you have the control over the quality of the tune. There is nothing worse than paying your hard earned money for a tune, for it only to be screwed up by a shop monkey (no offense intended to anyone here, just making a comment that a lot of shops have some pretty bad tuners with old habits - i.e. detuning tips and tails, this is a big gripe with me).
Personally, I get my skis stone ground and tuned up by a shop before the season starts, and I retune by hand before my first day on snow and maintain them all year, regular maintainence is a bit tedious at times, but your skis will thank you, and its easier to take care of them all the time instead of trying to do a lot every once in a while.
life is too short to have any regrets