The bed in the hotel I am staying at has the rigidity of wood! It gave me a terrible night as I woke up every hour or so with loss circulation in my limbs. Even after spending the whole night in bed, I feel more tired than when I went to sleep!
The only trick I know is to sleep over the blanket, which I folded in two, but in a place where its 37C during the day, the blanket offers very little padding.
What else can be done to improve sleep on a hard bed?