I try to avoid skimping on the descriptions for people, places, and things. Sometimes I can't avoid it. It's getting late, I'm getting tired or any number of distractions are occurring. Then you get descriptions like "You're in a desert. There is sand." Of course the players know by this point that anything mentioned by the DM is important enough to warrant further investigation. So off they go on a merry chase after whatever it is that is so important about the sand in this particular desert.