You may be really happy in your job and that’s great. But if a recruiter calls or a friend tips you off to a great position that fits your skills, are you ready to pursue it? If so, is your resume current? Are you constantly connecting with people in case a better opportunity presents itself?
There’s really nothing worse than a cold-call handshake. It means you’ve walked up to someone with no information, no introduction, and–worst of all–no plan. That’s never the way to do things, which is why the best advice I’ve ever received is to always have a plan, even if it’s created on the fly.