I second that.
See GMAT passages will always have a structure hidden inside the jargon and language of the passage - be it long or short.
What you have to do is decipher it and half the battle is won.
Spend quality time reading the passage to understand the following things:
Main Purpose of the passage and tone
Scope of the passage
Structural transitions with every paragraph.
And you must do all this without getting bogged down by detailing and unnecessary things.
Do not get intimidated with the words used in the passage - GMAT doesn't test vocab.
Once you have done this effectively, General Questions will be a cake walk. Also you get specific detail questions you know where to look for answers.
My RC accuracy was 40% when I had started and in my last GMATPrep I got just 1 RC incorrect, which too was a silly mistake.
What I usually do is spend good 3-4 minutes(when long) carefully reading the passage and writing down the structure along with the transitions. After this I can answer all 4-5 questions without even looking at the passages, generally. You need to have a lot of patience and concentration. If you don't understand a sentence, re-read it - Identify the structure of the sentence, not the technical language!