Books
Meditations, Marcus Aurelius (various translations); recommended: translation by Gregory Hays
Discourses and Selected Writings, Epictetus
Breakfast with Seneca: A Stoic Guide to the Art of Living, David Fideler
The Daily Stoic, Ryan Holiday and Stephen Hansleman
Letters from a Stoic, Seneca
Online Media and Podcasts
The Daily Stoic Blog: Ancient Wisdom for Everyday Life, Ryan Holiday