Skim Reading is the answer so far. There are plenty of different websites that teaches skim reading. But I have tried this one in particular and found that the methods here and the exercise they offer is very helpful.
http://web2.uvcs.uvic.ca/elc/studyzone/570/pulp/hemp1.htm
Unknown graffiti artist. Image photographed by Nurul Rahman,
2011.
Unknown graffiti artist. Image photographed by Nurul Rahman, 2011.