My InDesign education was all of about 1/2 hour at the end of a course, so almost everything I know I learned by trial and error. For my most recent assignment, that isn’t enough, but I found this series of tutorials on line that helped immensely.
Creative Mentor > Practical Learning for InDesign Users
Neil Oliver is an Australian designer and Adobe consultant who has made these 3-minute video sessions available on his website for free.
By following some of his lessons, I’m slowly putting together paragraph style sheets to imitate the New York Times editorial pages. Fun!