What worked for me was a knee board from the Rec Flying shop. My instructor reckoned that they are a waste of time, but for the first couple of navs where I did things his way (as you would!), I had paper going everywhere. On the kneeboard, I keep the flight plan on the centre clip with printouts of the ERSA pages for all the airstrips that I could possibly get near (with things like CTAF, elevation, etc highlighted) sitting underneath. General notes in the clear pocket on the right. The relevant map sits folded on top of the whole shebang, or is slid off between my right leg and the centre console when I want to read the plan, and the whizz-wheel and other toys sit in the door pocket. Easy-as!
Now all I need is two right hands so that I can fly the plane and write at the same time!