Man..WhenI was in my teenage years I used to have them daily. I got to the point that I could slip into lucid dreams intentionally. I would imagine I was holding an object, close my eyes and focus on its texture, and before I knew it I was in my dream holding that object. Took lots of practice! The trick was not to get too excited once you start to consciously feel yourself slipping into a dream state. Flying was hard for me, I could only ever get a few feet off the ground, so I just started hovering everywhere.