ppl general:
- A5 kneeboard
- large nurse's watch (I don't like stuff on wrists and hands)
- cap (I don't like sunglasses much)
- head set (probably supplied)
specific for ppl exam flight:
....pilotshop.nl/contents/en-us/p408_Wind_Protractor.html
Never used it since but excellent (easy and quick) for the one occasion when one is required to supply heading and time to a mid flight alternate.
Making and learning an exhaustive pre-flight checklist (including documents etc. and bathroom visit) was useful too as I remember.