During checkin at a hotel, bribe the person at the desk for an upgrade. Be friendly! During checkin keep a $50/$100 folded and clearly visible in your hand on the desk and ask if they have any complementary upgrades available. Some people say to sandwich the $$ between your credit card and ID. This is an old trick, look up $20 hotel tip upgrade for variations. That was when $20 was worth something, now it's more $50/$100.
