What are your must haves?
Adventure, notes, pen, pencil, dice, PHB, MM (& DMG occasionally)
What are the things you have, don't really need, but sure enjoy having?
iPad (for books & beyond for characters), DM's screen, side table for my "spread", miniatures, dungeon tiles or wipe-mat, a plush office chair on rollers, laptop and wall-based TV to display character hand-outs, NPCs and other objects as well as play music
What are the things you wish you had, but don't?
A table (with cupholders) with a built in TV for projecting battlemaps and other objects.