tl;dr:A brag document enlists everything you've achieved since your last review. It's given to your manager and peers making it easier for them to remember your achievements. It's also designed to help focus your work as you understand where you spent your time. Template included.
tl;dr:Julia, an engineer at Stripe, gives her perspective on working remotely by answering the following questions - Will I miss out on conversations in the office? How will communication work? Will people forget I exist? Can I take responsibility for really important projects? Can I get promoted? Can I be a leader?