Like Mark, I see connections between Lean and some of Covey's principles (e.g. Be Proactive, Sharpen the Saw). My major criticism of Covey has been insufficient attention to good processes. Principles aren't enough; the skeleton needs muscle to move. But I confess to having read only the The 7 Habits of Highly Effective People, and not some of his later books.
And regardless, I'm glad to see these two worlds overlapping.