I took the DAT in august and used a slightly modified kaplan strategy that worked well for me. However, I am a VERY fast reader so I'd recommend trying it out before actual test day.
I got a 20 on RC. All I did was number a few pages 1-20 right before the RC section. Each passage had a page and the #'s represent each paragraph. It is really helpful because during the actual test each paragraph is numbered. If there was something of note in the paragraph (a particular idea or persons name -- what kaplan refers to as "keywords") I jotted it down next to the number. I didn't write down something for EVERY paragraph though. This helped because if I couldn't remember where something was I could find it quickly or I could at least recognize the general location. I ended up finishing RC with about 8 minutes to spare so I went back and looked over questions I had marked. Another thing was that if I couldn't find the answer to a question fairly quickly I marked it and came back to it later. Often I would find the answer when I was looking for the answer to another question.
RC wasn't that bad, but I realllly focused and worked quickly, almost in a frenzy, to make sure I finished everything. I can't even remember what my passages were about now, which is funny. I honestly thought I'd get better than a 20 -- I think the tone questions may have thrown me off a bit.
Good luck!