What to do at the front desk at check out

When standing at the front desk of a hotel at check out:
Be sure to watch or have another member of your party watch your luggage.
Make sure all your items have been removed from the hotel's safe.
Make sure you turn in your room keys.
Be sure to go over your bill thoroughly and verify that all the charges are correct and discounts are applied before you sign your bill.
Make sure all charges are being placed on the correct credit card.
Be sure your frequent flyer and loyalty club programs are being properly credited.
Make sure you get a receipt. If paying in cash, make sure your receipt is marked "paid in cash".
Be sure to tip the bellboys if they have brought down your luggage, the concierge if you took advantage of their services and the shuttle driver if you use the shuttle back to the airport or elsewhere.