I've done 24. It just takes practice. It'a hard at first, and gets easier the more you do it. Eventually it's just a thing you do. I drink water (a lot of it)

I've done 24. It just takes practice. It'a hard at first, and gets easier the more you do it. Eventually it's just a thing you do. I drink water (a lot of it) and a couple of black espressos. 0 and ~2 calories each respectively.