I am heading to Singapore next weekend, and booked online via UA's site. Purchased r/t E+ (K and S outbound, S and L) return. Requested upgrade with money + miles right away and expect to be waitlisted til I check in at a kiosk on day of departure. I did this exact itinerary last summer and got the upgrades ($500 + miles each way). I figure I'll just wait and cross my fingers, but is there any advice from the experts here as to what I might do in addition/instead to get the upgrade to business? Any other advice, in general, about these flights? FYI, I am Premier Exec. w/ 85k award miles in the bank.