As far as books to learn effects/routines, Kirk Charles has put out quite a body of work on the subject. "Marked for Life" is a great book, and is your best bet. He also put out a DVD called "Miracles with a Marked Deck". The Boris Wild deck has been mentioned, so it should come as no surprise that he has a lot of material on marked deck work as well. I know he has DVD/lecture material, which I do not have. I have "Hidden in Plain Sight", which is good, and he has another book called "Transparency" (I do not have this, as it is my understanding much of the material is the same as the "Hidden in Plain Sight" book he co-authored with Charles.) Be warned: the Boris Wild material is usually tailored to the location of the markings in his deck. Many of the natural handlings may not work for other decks, depending on the location of the markings. Finally, the "Ultimate Marked Deck Companion Book" came with my Ultimate Marked Deck and it has some great routines in it as well. Not surprisingly, some of these are very similar to the "Hidden in Plain Sight" routines. Much like the Boris Wild material, the UMD material assumes the marks in a specific place so not all of the routines can be used with every marked deck.
On a personal note, I've found that the best use of MD is usually as a secondary tool to eliminate steps from other (non MD-related) effects. It's a great addition to stack work, which is what I couple it with 99% of the time. Most MD work/routines I see are hilariously transparent, so the more you can weave it into something else that can't be simply backtracked the better.