Highlighting and underlining
Most students mark too many words and phrases, so the markings lose their value. Highlighting and underlining can be helpful if used judiciously to identify key words and phrases for creating an outline of reading material.
Just summarizing class content
Summarizing is not useless, but it makes no connections among topics and does not change the form of the information. To be effective, summarizing must be used along with some of the strategies you will learn about next.