There are even authors who make a living writing books about salary negotiation. Salary negotiation is not complicated. I can explain how I do it in one sentence. I haven't read any of these negotiation books by the way.
The Secret to Salary Negotation
Figure out what salary you are happy with, and apply for jobs until you can find an employer that will pay you that amount.
I won't disclose my current salary, but I will say that in my recent job search I've had a few employers turn me down, and a few employers offer a job at my salary.