I am a bit of a minimalist in almost everything I do. Below is a picture of my gaming table.
At this end of the table you can see the adventure, one set of dice, a notepad, tablet PC for the PDF rules and shades. What else does the modern GM need? Tea, but you can see liberal cups of tea around the table so that is sorted as well. (Actually through the tea is in Brian’s honour as that is what he thinks British roleplayers only drink!)