Here's what you need in order to negotiate properly:
Leave any desire out the door. This means no expectations, no dreams, no goals. Let it all go. The opposing party would want to exploit any and all desires you have.
For example, a lot of women believe I want to fuck them. Around 12 years ago, this was true. I wanted to fuck all women.
Then I went to Thailand and trained under the Whore-Priestesses of Shabda-Oud. I realised that sex is only RM50. So any kind of the most debased fetish-filled fucking is only worth two cab rides to work.
I am sex-proof, in the nerdiest way possible.
Then, they think you'd want money. They think you want THEIR money.
After the heart attack in 2014, I realised that money is not everything and I mean that in the most non-cynical way. In fact, the greed or desire for money will make you lose money. Only when you allow money to come to you would you be able to make any significant financial progress.
2. Realise that you are not a slave and can walk away at any time
"You don't have to be nowhere forever" - Delirium, The Sandman Comics.
If things don't happen, or happen, the world will not stop spinning, and I mean that in the way galaxies spin or maybe the universe spins. I don't know that shit.
3. Finding true happiness is finding true wealth
If money or sex is no issue, and we have an over-abundance of food, then what is true wealth?
True wealth is time and happiness. The time to allow yourself to be happy. Happiness doesn't come from others or from things or from circumstances. Happiness is an absence of desire.
Let go of everything and be the wealthiest man alive. Or dead. Nobody cares.