wow, I'm amazed at so many people trying this technique and getting it really fast, I know I had to work like 4 weeks in a row, before I even got a few lucky ones, and I still can't get it on command, but I think I know what you guys do, but I don't, you just wake up naturaly and do it, and don't worry if it's the right way, I'm going to try that alot very soon, I also notice you try to make the scene reather then search something random, you build up from basic memory's of things.
oh yeah that and I just suck really bad at visualising in the morning.