TL;DR: What things did you do (or wish you'd done) to prepare when leaving a job? (I'm thinking along the lines of metrics, saving work samples, etc., but open to all types of advice.)
Background: I'm in an extremely toxic work environment and the pandemic has only made things worse. My department is chronically under-resourced and following layoffs in March, which reduced our dept's staff more than 50%, the workload has become unbearable. The emotional drain of working at the company has reached a point where I'm seriously depressed: no longer making progress in my ongoing job search, not socializing, stopped exercising, etc. Even with strict boundaries on work time, the days are extremely draining between the high volume of work and the persnickety personalities. I've known for some time that this isn't the role or industry for me and it's becoming undeniable that I need to cut and run to save myself.
Question: In preparing to leave, what should I be saving, making a record of, thinking about? What types of work samples do you keep? How many samples do you keep? Did you start making a list of references with a list of anecdotes they could speak?
Note: Saving info / work samples isn't against my company's policies. My company has a system for providing work samples to departing employees. My work doesn't involve sensitive information.