So sidewalker_Principle noted that we all seem to be an older, fairly successful gang here. What's the one best life lesson you've learned?

Expression of emotions is healthy and beneficial in a measured and reasonable manner. Basically, don't be a robot, but keep your emotions in check. Love or passion can go a long way to motivate someone, but don't let it consume you. The same with anger or fear. I think it is very important to examine why you have a certain feeling and determine the rationality of its effect on you as you make decisions. I get angry frequently, but rarely act out of anger. I sit myself down somewhere, usually pulling weeds, and have an internal dialog about what the root cause of my anger is. Once I've found it, I go to work on the cause, rather than my emotional reaction to it. Some things I work out pretty quickly, others I've been going back and examining for years.