You basically have to find what works for you and it can't be taught as everyone is different so try different ways til you find the one that is all you and stick with it and perfect it. Some people lock themselves into a quiet room with no distractions while some do the same thing but with a radio playing. I was a NM State Police SWAT Memeber/Federal Officer and worked after college each day so I used to study by the glove compartment light while in a high speed pursuit across New Mexico and it worked for me but I had no other choice so the point here is find whatever works for you