I would add...
Nite ize gear ties are amazing - so much quicker, easier and more versatile than using velcro ties.
Laser distance measuring tool and soft cloth measuring tape.
A proper focus chart
Shower caps, vinyl groundsheets, space blankets and umbrellas for weather protection.
Leather chamois
I prefer these to noga arms. Nogas tend to lose their mojo as a result of people grabbing and twisting whatever's on the end of them without loosening first.
These clips are great as a quick and lightweight french flag holder
A selection of pelicases is always good, as are zippered pouches (especially ones with a clear plastic window).
Sets of 15mm bars of various sizes
When working in cold weather, silica gel packs (for lens boxes) are good to have
Ratchet straps always come in useful.