I read a lot of general material ( books, newspapers, etc.). A couple of years ago, I used to read with a notepad, essentially annotating as I read.
Nowadays, I switch context while reading a lot, i.e. I will chase down an unknown or new idea before continuing. Interestingly, the vast majority of queries go to either Wikipedia or Google Images, e.g.:
How do you read?
I have only one peculiar reading habit of which I'm aware. When reading technical material relating to something I am trying to learn I like to do a lot of re-reading even after I understand the material. I started doing so when I first learned to program C++ in high school. I got out of the habit for a while in college. Ironically, I think I got too busy to study properly. Now I find myself returning to it. I seem to have some kind of intuitive standard that I use to judge how well I've internalized what I read. Until I meet a level of internalization I'm happy with I like to re-read.
-- David W.
I certainly read with a notepad; what else I do depends on my mood (or perhaps the material), I think. Some occasions my interest lies purely in the material at hand, and I'm not all that interested in leaping to another topic on another medium (or is it just that I don't want to get up off the couch?) Other times, I'm more than happy to look everything up, at which point it's generally Wikipedia. -Eric