In dreams everyone can fly without any strains of gravity. The flying dreams are especially common for those who practice lucid dreaming where one becomes aware it is a dream what one sees. Best way to achieve this state is to start keeping a dream diary. The point is that one should start to become genuinely interested of dreams and allow them to develop. I used to do this once but then gave up. I miss that and I guess I should start doing that again because I want to fly.
This is actually very similar for anything we do. There are tons of books on "Zen and doing something". The ultimate lesson there is to become open for all the possibilities. So, you may have some primary goals like to see dreams of flying, but what one should actually do is keep the mind open for anything that can happen.
In photography this is very hard lesson to learn. When I go out with the camera, I often become blind because of some primary goals I have in mind. Therefore I may loose excellent opportunities to discover something completely different than what I was planning to. So, only way to reach the ultimate goal, to become open for all the possibilities, is the quantity. One just have to repeat the process till you get over it and process stops being the primary goal.