There're some sticky in the forum regarding R/C and ways to tackle them. But it varies between individual and what you need to do is to read those tips and then adapt them to fit your own style. However, it seems the general view from most appear to agree upon the following:
- Read actively. By that, it means not just reading for the sake of it, but read and understand what the author is trying to see
- Try to paraphrase each paragraph. Read and see what the author is trying to explain/put across. Paraphrase the section. Is the author trying to introduce a new idea, argue upon an exisiting opinion or simply just tyring to show an example.
- Take down key words. Note key words so that it's easier to do a 'search' later on when you're attempting the questions.
It takes a while to get used to it. I suggest you adopt a style quickly, practice it and fine-tune along the way. Try attempting R/C questions with the style you chose, with no time limits. The objective is to get familiar. Once you're familiar enough, go for speed and accuracy.
Good luck.