*TYPES OF LIFT...
and what do you do when the wind quits?"
Wave lift:

I f conditions are favourable, another area of lift can be created on the leeward side of a hill or mountain, this is called wave lift . As the wind travels over the hill or mountain and comes back down the other side, it encounters the stable air mass on the backside (lee side) of the mountain. When it hits this stable air it is deflected away or rebound in an upward direction. This rebounded air will continue to rise, then it forms a crest and returns back towards the grounds, where it hit the stable air again and is deflected once again. This action forms a standing wave (waves that remain in the same spot) and may continue for many cycles, losing intensity as it gets further away from the mountain.

 
The picture below is a 3dimention rendering of a flight path done in Nevada, same place and almost same angle as the picture beside, notice lake on the left. The coordinates recorded during the flight by the on board GPS: height, longitude and latitude have been rendered and applied over a 3d map of the actual area. Notice the spiraling sections "thermalling" , some of the turquoise coloured sections indicate straight and level flight, flown in "shear wave" at speeds of 120Knots!
rendering by: Charlie Thaeler
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