Ask HN: Changing jobs, what should I remember to do from day one

I've been working at my current job for over 4 years, it is/was a startup that just went bust. I am leaving for a similar company, although an established and big one.

At my current job I did one thing that I think was nice.

- I saved all screenshots I ever took (instead of dragging to Trash I simply dragged to "Work Trash"). It makes it fairly easy-ish to stroll down memory lane to see what was being worked on at any given time (almost).

At my next job I plan to do the same, with the addition of maybe write a 'job diary' with things I work on. For use in performance reviews and later job searches.

Are there anything else like this that can be helpful to do, down the road?

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Bonus question, is there anything I should do during my last week at my current job that can be useful? I've gotten signed 'he worked here' papers, but that's about it.