Here are some tips of my own.
Don’t accept right away!
Always negotiate. Nobody is going to take away your offer because you tried to negotiate.
This industry leaks like a sieve, especially among recruiters and hiring managers. However, the strategic omission of facts is fine when you aren’t ready to disclose them.
Get a coach?
You can hire coaches like Josh Doody (author of Fearless Salary Negotiation) to help you. It makes economic sense to pay a sizable % of your salary increase for this because you get to keep benefiting in perpetuity. I personally have not yet done so, as I wanted to try it myself.