Before I interviewed for my first (and current) management position--corporate, not health-care facility-- about 16 months ago, I went to the library and checked out literally every book they had on interviewing and salary negotiations, which I was particularly nervous about as I'd never done it. Many of them had good advice and tips. I can't recommend any one book in particular, but I do recommend doing research at the library or on-line beforehand so you can "arm" yourself with some facts and figures and be prepared to back up your demands. I learned a lot about some of the NON-financial things which needed to be negotiated, like job title, parking, office allotment, administrative support, benefits, vacation, retirement plan, stock options, bonuses, profit-sharing points, travel/expense accounts, cell phones, laptops, etc.
Not all of those may be applicable to you. But I didn't know about a lot of them until I read up--and still didn't know about some of them until a few months into this job. The best reason I can think of for doing research is the same as reviewing before taking the nursing boards,---not so much because you NEED to, but because it boosts your confidence. Good luck and let us know how it goes!