Topic: Calculate your salary needs first!
Work out what you need to live (or stay afloat). I have read and heard this argument before, but I don't buy into it at all. Take these 3 scenarios.
1. You are a medical doctor, and I've paid off all your student loans, you live in a modest house. You need 60K to cover all your expenses. But other doctors with your level of experience and qualifications make around 130K. Are you going to take what you need?
2. Your previous jobs have earned you 20K per year. Maybe your spouse earned 30K, before he/she lossed his/her job, maybe your spouse fell sick, maybe you have additional medical expenses. You once got by comfortably with 50K. Maybe with all the changes you absolutely need 45K just to survive. You can't just go to your next interview and ask for 45K because you need it based on your personal circumstances. Your type of work pays 20K, maybe 30K at best.
3. Maybe if you are a new grad and you earned a bachelor of arts and you want to be an administrative professional, and the starting salary is typically 35K, and you absolutely need 28K to get by, then the work-out-what-you-need model works; but that only works because what you need happily coincides with roughly what you are worth anyway; but what if you are an electrical engineer and you absolutely need 28K. You would still be seeking the median starting salary of about 56K to begin with, because that is what engineers get paid. You might privately set a low of 45K, but I doubt you would do as low as 28K.
In each of these scenarios what you need is completely irrelevant to what you are worth based on your skills, experience, and qualifications, and the job market.
Let me give you one more example, a real example, based on a conversation I had with a company recruiter. They were giving me the same work-out-your-expenses philosophy; and my response to that is - I need $0 to cover my expenses. Yes, I am out of work, but I am very fortunate to have a spouse that earns an income to support us both, so based on my expenses I don't need a salary in order to survive. Likewise, when I am working, she doesn't need an income, but we both choose to work when we are able so that we can build up a savings and have disposable income to spend on things we enjoy.
So does that mean I should be giving my services away for free when as an engineer a very low-ball amount for that kind of work would be 50K.
My advice: Find out what you are worth based on your skills, education, and the job market. This includes discounting that amount by a percentage (5,10,20% or whatever) since it is a recession, it is a supply and demand market after all.