Way way back in college, one of my design instructors asked us "Who has more power in a negotiation? The client or the vendor?" Most of us said "the client." Then the instructor gave us the answer which has stayed with me ever since. "The person with the most power, is the one who has the most options." Wow!
As if a follow-up to that, my Dad always liked to say "The more options, the better." (I had a girlfriend who also liked saying that, and now I understand why, but I'm not sure if that's relevant to this discussion.) ANYWAY...let's examine how this works in the real world.
In Career Paths
Most people go through life content to work their 9-5 jobs. But when for some reason, they lose it, they are forced to find and take another one based on what limited jobs are available or offered to them (maybe one or two) . But the person who scans the job listings every week has several options open to them on a regular basis. Every week, they have the choice of staying or doing something else - EVERY WEEK. But if you only look for a job AFTER you get laid, off, well, a bunch of other opportunities could have already passed you by. In fact, your dream job might be out there somewhere, but if you're not CONSTANTLY looking out for it, you could miss it!