I go along with Kolibear.
Each trip I make means the map is folded in the most appropriate manner. At least this way you know that the congested bit of airspace that you need to have on you lap doesn't lie in a fold.
I also use those really tiny bulldog clips to keep it from unfolding.
Top tip if you do use paper clips/bulldog clips........when you leave the plane make sure there are the same amount attached to your chart as there were when you got in.
I had a plane re-upholstered a while back and went to the hangar the evening of the day the bloke had been to gut the interior. In amongst the pulleys for the rudder was a mini-bulldog clip that I had lost the week before.
Makes me shudder just thinking about it
