You're looked at types of writing in your field (email, reports, presentations, posters, etc.) and see what elements make up those types of writing. In addition to keeping up with webpages, scholars, and articles in your field there are also books to read.
Not everyone has time to read all the books that come out in a given year so book reviews are one way to stay on top of the newest ideas in the field.
find a book review for your topic/field/major/interest.
Here are two different examples of book reviews for you to see what I'm looking for.