Effective writing generally starts with effective reading, and effective reading means knowing when the situation and text call for something more or different than a page-by-page slog with a highlighter in hand. The links below offer help in reading for knowledge and reading for writing.
Reading to write: this UNC-Chapel Hill Learning Center guide outlines reading and writing strategy tips.
Academic reading strategies: this handout from UNC-Chapel Hill's Writing Center discusses strategies to utilize before, during, and after reading assignments.
How to read journal articles: an in-depth PDF that identifies the key elements in a journal article and how to read them effectively.