Dubai airport is pretty rubbish. Assume you're flying on Emirates? If so, that's probably the best of the terminals - there are showers there which aren't too bad. Nothing in the way of shops, and it's pretty smelly and busy most of the time as there's lots of stopovers. Blanket and pillow is a good idea! The best coffee places are towards the gates - there's a Pauls and a Costa at one end, and I think a Starbucks at the other end (Pauls does the best coffee and pastries). There is free wifi through most of the terminal, though, and some scattered charging points with UK plug sockets

Have fun!