Half plough
When descending, allowing one ski to remain pointing in the direction of travel, whilst the other is skidded out at the tail and partly pressured to slow the skier down.

Half skating
Also known as the track skating, or marathon skating, or Koch skating, or single-leg skating, or one-leg skating, or Finnstep, or Finnish step, or Siitonen step, this technique is generally used in tracks, with one ski pushing (skating) whilst the other gliding ski remains in the track, or sliding in the direction of travel.

Heli-Skiing is off-trail, downhill skiing that is reached by a helicopter.

Herringbone skating
See diagonal skating.

climbing A method of ascending by alternately lifting one ski and placing it ahead of the other, and placing them in a divergent position to each other on the snow.

Ridge in the snow for jumping- how you 'get air' in snowboarding

Hockey stops
See swing to the hill.