I'd say handling people is the most important thing you can do as a coach. I've found every time I've gotten into trouble with a player, it's because I wasn't talking to him enough.
An agent won't help you get drafted higher, won't make you win more games, and won't make you faster or stronger. They all say they can, but the people who do the drafting don't talk to agents. They talk to coaches, they watch film, they talk to the people who've worked with players. They don't talk to agents.
Your neighbors will make judgments about you based on how your lawn and house look, and people who see you passing will judge you based on how clean you keep your car. It's not always fair, but it has always been true. Appearances matter, so make yours a good one.
So many times people are afraid of competition, when it should bring out the best in us. We all have talents and abilities, so why be intimidated by other people's skills?
In adversity, there is opportunity. Show me someone who has done something worthwhile, and I'll show you someone who has overcome adversity. I've never known anybody to achieve anything without overcoming adversity. Adversity is another way to measure the greatness of individuals. I never had a crisis that didn't make me stronger.
Had I been a great athlete, I'm not sure I would have even gone into coaching. I may have turned out feeling that my life ended when my athletic career ended, as happens so many times with various athletes.