I don't read a lot of blogs, but the few that I do are ones that offer food for thought. Dr. Alex Lickerman's Happiness in This World blog is one that satisfies deeply, over and over again.
His entry on "How To Be Great" should be required reading for dog trainers (whether practicing, wanna-be, hope to be), or anyone who is in pursuit of excellence.
While you're visiting Dr. Lickerman's blog, be sure to poke around and read many more of his posts. There's a beautiful resonance that hums through all of his writing, a song I look forward to hearing.