One effective way to take notes while studying is to use the Cornell method, which involves dividing your note-taking page into three sections: a cue column on the left for keywords and phrases, a note-taking column in the middle for sentences and main ideas, and a summary/review column on the right for summarizing the main points. Additionally, it can be helpful to use abbreviations and symbols to save space and make your notes more readable. When reviewing your notes, it's important to summarize and condense the information as much as possible to make it easier to remember and understand. Additionally, actively engaging with the material by asking questions, highlighting important information, and summarizing key concepts can help to better understand and retain the information.