When I started, I learnt Turnover pass, Classic pass and Invisible pass, which is basically basic Classic pass with strange rocking motion, from Ninja dvd by Brad Christian. It was 1.5 year ago.
Then I learned Dribble Pass from Luke Jermay, and used this pass for awhile.
This January I saw Akira Fuji performing his pass on youtube. I imediately got his dvd Encyclopedia of card magic expecting he'll teach most invisible pass on planet (like his). There I learnt TCCP (Top card cover pass) and I re-learnt classic pass, the sleight which I was forgotten at that time.
I started working on pass a lot. Almost everyday I was showing my progress to my best friend and magic buddy Tadiko. Yea, I was pissing him off but he helped me a lot.
Then I saw that Akira Fuji has developed PSP (plates for speeding up pass). But they were too expensive for me, so I decided to make something like that at home.
I glued one deck of mine so I had 2 blocks, 26 cards in each. I inserted some metal plates inbetween cards, so blocks would be more heavy. And I practiced like that a lot. Sitting at my house, watching movies, Tv, talking to friends over the phone I was practicing pass.