Stoic advice: how do I keep training myself to become a better person?

R. writes: I have started reading about and practicing Stoicism in Spring 2018. However, during these two years I have not always done it to the same extent. When I was spending a lot of time practicing and reading, I had what I think is a good life (applying the four cardinal virtues, etc.). However, often there were periods of time where I read and practiced less, or