Protip: timewaste comes not from the companies themselves, rather sneaky recruiters, who will, at some point in the conversation, offhandedly ask 1, to provide

Protip: timewaste comes not from the companies themselves, rather sneaky recruiters, who will, at some point in the conversation, offhandedly ask 1, to provide references (previous managers you've worked with), and 2, who's interested in you currently (usually dressed up as "how do you find the marketplace?" -type of questions). Do not, under any circumstances, give out these datapoints early in the game (personally, I don't give them out at all, but I imagine some large corps to require at final stages). Recruiters will use this as lead-generation for potentials to sell candidates of their own. This will not only lower your chances in potential new places, but destroys your reputation with your existing clients. For more information, see the book "Dirty rotten recruiter tricks" :)