Don't do any shit sponsored skiers do. You pay for your shit, so make it last. Odds are if you have to ask, you're probably not even good enough for it to make a difference. Just detune the edges if you're hitting rails.
I don't know where this 'breaking in' concept came from. It's total bunk.
What you should do to your skis before their first go is age them properly. Find an appropriately dark, cool and moist place, like a basement. Lean the skis against a surface at a 30 degree angle. Let sit, turning 45 degrees every 4 months for two years. I've aged some pairs longer to great results, all depends on the materials, moisture content and ambient temps. Don't freak out about rust, it's natures preservative, and what a file can't take off, an angle grinder will. Remember, it's not about having fun, it's about keeping your most valuable possessions locked away in your cellar and seeing then three times a year.
"He was the spearhead of the mod force. Everyone knew who he was and feared his wrath. There really isn't anyone like that anymore. Rowen didn't just delete their threads, he deleted their souls."
flex the shit out of them, do some light bounces on them between two cinderblocks, it will actually help if you are looking for softer skis. By the time i have properly made a ski as soft as I would like it, the edges are usually gone, so doing this actually can help.
Yeah pretty much once a ski softens up it looses te feeling and much of the pop. Skis feel best after a couple if rides. After half a year or so they will have lost a fair bit of pop. They can feel fun and buttery but if your after tht just get a soft ski to begin with.