How to Negotiate a Job Offer
The "Pre-Reqs" piece is not right. You really don't need to have another job offer or a current job to negotiate. A while ago I wrote up this script for how to negotiate a job offer with no leverage at all when you intend to accept it no matter what: http://bit.ly/1185CGmMost job offers come with leeway for negotiation, regardless of your situation. All you really have to do is ask.