Depending on when you arrive in resort and when the relevant shops open/close for the day, you'll hopefully be able to grab everything you've ordered once you arrive. This is especially useful if you're getting there in the early afternoon, as it means you can secure everything you need, ready to hit first lifts the very next day.
However, even if the lift pass office and ski hire stores are closed for the day, you'll often find that they open earlier than first lifts. This gives you the opportunity to get up early and get everything you need for a full day on the slopes!