Two tricks to try. Wet the edge of the tire a bit. Mount the tire first at the valve stem with you standing and the lower edge of the rim on the floor. As you work the tire on, also push the tire down on the rim towards the floor. This should work some slack into the system such that by the time you get to the last bit you can pick the wheel up, wedge the close edge into your hip crease and roll the tire on by pushing away from you using the heels of your hands.
Hope that helps.
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2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS