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.
Guy KawasakiUnfortunately, they develop a fixed mindset that they're the most talented, and they think that continued success is a right. Problems arise because pure talent only works as long as the going is easy. Furthermore, they don't take risks because failure would harm their image of being the best, brightest, and most talented. When they do fail, they deny it or attribute it to anything but their shortcomings.
Guy KawasakiLooking back on my own career, I've come to the conclusion that too much money is worse than too little.
Guy Kawasaki