I took Testmasters and they had a really good method for dealing with RC. So here's what I have written in my notebook from the class:your primary goal is to find the main point of the passagewrite down the main point at the bottom of the page when you are done reading--should be either 1 really long sentence or a couple of short phrases.the terminology may be difficult, but the main point rarely is.look for: causal arguments, distinctions, author's attitude, and toneHope it helps. It's been since June since I looked at any of this stuff so I'm not sure if it makes sense anymore. Good luck.
^^ Scampura gives some great advice. RC was my worst section as well, primarily because I'm a passive reader. Often, when I read material that is boring (like LSAT passages) I don't really focus on it, so after I read it I am still not really sure what it's about. On the LSAT, summarizing each paragraph after reading it really helped me. However, I definitely wouldn't recommend going so far as writing down sentences about them; just do a quick little recap after each paragraph to make sure that you understand exactly what it is saying. If you don't understand, read the paragraph again. I guarantee you, the time you use rereading, if necessary, is better spent that way than reading the questions at the end and then having to go back and search through the entire passage for the answer. So, I think the key is just to read actively.