I first read the effect of each trick, see if I would like to perform it, and if I don't, I move on. If I enjoy the scheme of the effect, I dive into it, reading the directions and tips carefully WITHOUT cards. Then I read the effect a second time, with cards, following along. Then I continue through the book, repeating the pattern.
Then I go through the book a SECOND time, skimming through the book for interesting sleights and tips, writing them down possibly if its good, and if the author references another book, I will remember to possibly buy it if I seem to like the sleight that was referenced.
If you get bored reading the book because you know most of the moves, read some more challenging. I bet you have gotten bored of reading RRTCM for the tenth time (after eight times, I am still not bored though!), or the first book of card college too many times.
Then I would suggest looking at the Expert at the Card Table and really practicing the moves there. If you know almost all the moves well enough, then move on to something like Earnest Earick's material from Stephen Minch, or Krosby's stuff. You will be reading that book for AGES.
Also, like Clee said, things like the double lift or the pass could have some great tips that you might want to add to make the sleight better. I remember RRTCM had some GREAT tips on the top change or something

. It made it silent.