hi,
i got a %ile of 97 in CAT 2003 and managed a call from NITIE, but cudn't convert though
for RC, the key is reading and reading more....

no other short cuts for RC
read Front Line, Business World etc etc and every book u find under the sun..
make sure u read them with interest.
parallely try to figure out the words u find new, and note down the word with it's meaning and it's usage.. that shud really help u.
KEY: read more and more, read stuff from diff areas
All the Best