I second this. Focusing on good teachings such as "Meditations" is simply a good way to live life, and the rest follows. Related to "Meditations" is "The Art of Living" which is a collection of teachings from Epictetus. Epictetus was Marcus Aurelius' teacher. It's collected in such a way that each page makes a point that you can think about for the rest of the day and try to apply it - like a devotional.