First thing I do is when booking on the phone with Marriott Platinum Reservations is to request an upgrade. The hotel will see your request, although it does not appear on your reservations that you have done so. The hotel will see it, and in my estimate, more than 50% of the time my room is already "preblocked" for me upon arrival, with an upgraded room number already assigned to me. This has been uniform for me at Marriott hotels/properties for years. I was wondering what other members do to increase their chances of getting an upgrade? I did not realize it was a problem for so many members, and thought perhaps individuals could share their "helpful hints" here. Everybody have a good day/evening!