Truly a good post ventivish ! +1!
Disclaimer : I am not an expert or whiz at RC. Take a pinch of salt while you read this post.RC is just a bigger CR.
From my experience ... RC requires good understanding of the material presented. If you understand what is written, you have won half the battle. I spend a good amount of time reading the passage (~3-5 mins depending on length and density of the passage).
Apply your CR skills. They are crucial for RC.
1) Read closely. Concentration is important.
2) Understand the premises/conclusion of the passage.
3) Read the questions carefully. Know what is being asked.
4) The wrong answer choices are formulated just as they are for CR. Some are Out of scope, some are half right-half wrong, some are enticingly close to the language (use the words used in the passage but they state things not in passage) etc.
One thing that has immensely helped me was suggested by someone on this forum, try to take (or at least fake) interest in the information presented. Takes some time to develop, but this skill helps
The RC passages can be VERY BROADLY classified into three types
1) Business/Economics related.
2) Humanities related (social science, art, history etc.).
3) Science/Environment related.
The question types can be broadly classified into two types
1) Global questions :
a) Primary Purpose of the passage
b) Main Idea
e) Inference (This may be global or partial)
f) Most/Least supportive (This may be global or partial)
2) Partial questions :
a) Bolded portion (I was informed GMAT has stopped using line 23-25, line 12 kind of questions)
b) Particular detail/process from a paragraph.
d) Most/Least supportive.
Global questions require us to know the general outline of the passage.
Partial questions require us to go through particular (nit-picky) details presented.
Sometimes the passage is just too dense, try to get as much as you can from the passage (just as we do with dense CRs)
I guess this is getting a bit long and boring. I'll stop. I hope this helps at least a bit
"You have to find it. No one else can find it for you." - Bjorn Borg