Those little extras

I'm juz organising all my wood/screws/nails etc for my decking project.
But from previous projects I learn't the little extras that make the job easier are always worth the extra spend.

So to all those experienced deckers out there, what are those extras that make life a little easier when building a deck.
I'm looking for things like screw types, nail guns, drills, spacers for the deack boards, etc etc.
I'm building a deck straight on top of an existing slab using 70x35's flat and dyna bolting to the concrete, then laying 90x45's on this and attaching the decking boards (90x19 Merbau).

Any assistance will be greatly appreciated!