I use an A4 kneeboard, with A5 clear plastic sleeves on a binder, filled with pretyped paper, with boxes for any information I receive during the flight and appropriate spaces left. I then use fine non permanent markers to write down anything pertinent on the plastic. Really cuts down the memory workload from behind the controls and it doesn't waste paper. Aerodrome charts go underneath in A4 for easy viewing. And then it has a clip on the right for PLogs etc. I've found this invaluable in making flights easily manageable.
Lightspeed Zulu 3 (absolutely invaluable, the clarity of ATC communication compared to school headset is incredible, as is comfort). Checklist, watch, map, diversion plotter.
And the obligatory pair of Aviators, of course ;-)