Prety much what the others have said. The desk should be ready, the phone if they have one (with voicemail password and instructions), the computer, their emai

Prety much what the others have said. The desk should be ready, the phone if they have one (with voicemail password and instructions), the computer, their email and necessary passwords, necessary passes to the building. They should get their HR and finance stuff done and not have their first paycheck delayed. They should be given something to do, even if it is busy work initially, like reading whatever existing documentation you have on your setup. They should also be given the means and clear direction to do that work. For the next week or two, their official or unofficial lead on the team should answer questions and check in every hour or so on what progress has been made on the initial assignments, inevitably they are missing some password or permission or explanation of how things are set up at the company. The key is to have everything ready for them, be open to questions, and helpfully check in every hour or two for the first few days to see how things are going. Usually I have 100 questions, but after question #30 figure I should pace myself before bothering the lead or manager again with yet another question. But if they approach me in a helpful, friendly, unrushed manner and ask if I have more questions or if I am stuck, then I will get all my questions out faster.