Even at very open companies there exists lots of secret sauce, but most of the valuable work of the company is not particularly sensitive, and much of it has widely generalizable lessons. Write about those lessons as you learn them. If at all possible, publish what you write. Even if it is published to an audience of no one, you will be able to... See more

if you have the choice between multiple jobs, all else being equal, pick the one where you are able to show what you've worked on.

Don't end the week with nothing. Prefer to work on things you can show. Prefer to work where people can see you. Prefer to work on things you can own.

Because when your work is in public, you can show it to people. That's often the best way to demonstrate that you're capable of doing work like it.