You'll get an email to your University email address when a book you've requested is ready to pick up. If you want to keep an eye on its progress, you can login to MyLoans, and click the link in the top-left hand menu that says eg, "1 request (hold)"
The Status tells you where you are in the queue for that item, and if it's "In transit" (on the way to your pickup library), or waiting for you on the shelf, along with the date by which you must collect it.
You can cancel requests you no longer want there, too
Items requested from Storage generally take 4 business days to arrive in the library you nominated for pick-up.