As you are aware, our entire core time was spent with immersing ourselves in a self-guided learning experience. Teachers modeled the behavior by immersing our time into our own topic of study. My time was spent with reading the book, The Power of Habit by Charles Duhigg.
Here is a link to Charles Duhigg's website for resources, if you are curious. The Power of Habit
(The "Resources and Teaching Guides" page is interesting.)