Can some one explain more "The second pass" of [how to read a paper][1]by Keshav.
He said on the second step of reading a paper you should read the whole except proofs.

1. Am I should neglect some thing else?
2. Am I have a specific strategy on each "paragraph" of the each sections? 

I still have problems in reading the paper and the subject is not so new to me I am familiar with the problem which the writer wants to solve.

How to find those parts which talk about the main idea?

when I go to their suggested work to understand the main idea. I have to know their previous sections because they define some notations and definition which they use them on their suggested work.

When I go to read those parts to understand the notation I tell my self is my work OK? 

because after reading the notations and definitions , I should start to learn their suggested method. and also that one still has its challenges. 

But My adviser said you should understand the main idea in one or at maximum in two hour. But my work need at least 5 hour.  

(Maybe help: I am reading a paper on the computer network  field )