I am sure you have posted the query under wrong thread, so I am moving the same to relevant forum.
Furthermore, as far as your query is concerned, I will tell you what helped me.
There are many strategies on the forums. But the key points I would quote are:
(1). Never skim a passage: Why?
Because when a Detail question is asked then you know which paragraph or where to go for looking into detail.
(2). Stop after reading each para: Why?
To check you know the organization and tone of the content/author.
(3). Skim through details and focus on organization
(4). Practice from Aristotle RC99
I Assisted You => KUDOS Please