"Toe": Think of a hill or mountain, from which are several descending ridges with little valleys between them. These little ridges, in the west, are called "toes". Look down at your bare tootsie, thinking of the bones in your foot as part of the toes...
"Draw": Wash, wadi (in the mideast), ravine, gully, commonly-dry steep-ish creek channels...These may be referred to as draws.
"Saddle" as RickR said. A low spot in a ridgeline, commonly a bit brushier than the higher ridge, and favored by deer as an escape route from one side of the ridge to the other.
In the country west of San Antonio, white tails sorta behave like mule deer. They go up draws, and go downhill on or along a toe--they'll follow the brushier parts. The larger bucks will bed down near a saddle on the downwind side of a ridge, just below the "military crest" so they won't be silhouetted. They usually run upwind and uphill to escape, using the brush in a saddle as concealment.