This one really can't be overstated. Yes, salary is incredibly important, but it's not the only factor you should consider in a negotiation. There are lots of other opportunities to improve your quality of life through your total compensation package.
Don't forget about...
Flex work schedule
Remote work options
Professional development funding
Contribution toward health insurance premiums
Student loan payment contributions
Parental leave policies
Professional growth opportunities, such as speaking engagements, trainings, or being positioned as a thought leader in your field.
So, let's say you're in a negotiation and the hiring manager wants to know your salary. Saying something like "I believe $120,000 would fairly compensate for the skills and experience I will bring to this position, and I'd like to discuss the total compensation package as this conversation moves forward" communicates that yes, you have salary requirements, but you are also looking at the big picture.