The most powerful sign is that your work no longer enchants you - it's not deep, delightful, and mutually satisfying. When this happens, it may be time to look for new challenges.

Second, you need to spread the large amount of information knowledge that you've gained-pooping like an elephant. This means sharing information and discoveries with your fellow employees and occasionally even with your competitors.

When you’ve worked hard and done well and walked through that doorway of opportunity, you do not slam it shut behind you.

Do not write to impress others. Authors who write to impress people have difficulty remaining true to themselves. A better path is to write what pleases you and pray that there are others like you. Your first and most important reader is you. If you write a book that pleases you, at least you know one person will like it.

Good people hire people better than themselves. So A players hire A+ players. But others hire below their skills to make themselves look good. So B players hire C players. C players hire D players, etc.

Writing is the starting point from which all goodness (and crappiness) flows.

Let yourself be enchanted in small ways.