Preview - survey the material to get the big picture before reading the material.
Question - set your purpose; ask what you already know. Ask what's important to understand from this assignment.
Read - read for meaning and annotate text. If you don't understand, adjust your strategy i.e., re-read or read slower.
Recite - summarize what you just read by saying it or writing it in your own words. Make a note of questions that occur to you as your read.
Review - go over it regularly so it stays fresh.
Web sites on these and other topics on reading college texts.