We've wrote a lot about the tactics of salary negotiation,but this article focuses on negotiation techniques you want to avoid mistakes that could result in a much lower job offer — or worse — losing the job offer you worked so hard to obtain. These phrases are what you never want to say in a salary negotiation.
"I accept your first offer"
The employer often offers the job and salary simultaneously. Never say yes right away -- even if you like the offer. Try not to end your negotiation process before it even starts.