Snow you say? yep, got a bit at the moment and it dosnt look like we will be going too far.
Both techniques discribed are correct. It depends on the situation. I prefer the "zero zero" method, and this is the only way to go when at any sort of altitude. Then when lifting off, as well as moving forward, also a more positive climb angle to ensure you are not flying into something! Distances can be quite deceptive when flying in these conditions, especially at higher altitudes where there are no objects to give you scale. One thing to be carefull of, is when you start pulling collective, make sure you are not stuck to the snow/ice. A bit of a wiggle with pedals and cyclic should help.
There are lots more traps so be very carefull.
Off course, SASless has described the best method of all...
Fly safe.