There are many reading strategies. In light of this, I will give a few of them.
First, often students read to understand everything at first. When they do not understand something, they stop and this frustrates them, because reading takes so long. In many cases, it is better if the student just continues to read the work until it is over. Often times, the later parts of a work give insight into an earlier part of the work. The upshot of this is great comprehension. After reading the whole work, then the student could go back and fine tune things.
Second, another technique to comprehending more is the know a little about the field of study. In other words, the more a person knows about the field, the better the understanding will be. Reading a few articles and book reviews will help tremendously.