I have found that since I have been living in Japan I have gotten good at getting to my feet from sitting on the floor.
While living in NA it is not something I did all that often, and I can remember on the few occasions I would be sitting on the floor, (I honestly cannot think of a good reason I was doing such a thing just now) when it was time to get up I would roll around for a while, then carefully stick out a leg or maybe a hand, trying for some leverage or maybe some momentum, straining as the leverage and/or momentum was incorrectly applied, add to all of that effort some hefting and heaving, and I would arrive on my feet, still teetering and tottering with a little huffing and puffing but usually able to stay upright.
Now I deftly place a hand , give a little shot of umpmfh and voila! I am not only firmly upright but already striding in my intended direction.
I am still not used to sitting on the floor the way Japanese do though. They have this ability to squat on their heels comfortably for long periods of time. I can only manage to sit cross-legged at the kotatsu table, and usually not for an entire meal. I find the need to move my legs to a straight out position, which is usually OK since everyone else is pretty good at sitting "normally".