I find folding 8½ x 11 paper in half fits my kneeboard like it was custom made. Being right-handed, I load the paper in with the crease to the right, so that my arm/sleeve won't catch and fold over the loose pieces. I write my weather briefing on one, and my nav log on another [NOT back to back!]. Nav log on top, weather second, additional blank sheets below. If going to a towered airport, put one blank sheet in front of the weather briefing, to record ATIS information and any departure information that you may need.
Open the sectional to show where you will start, and fold to be two sections wide [one vertical crease showing]. Fan fold the rest out of the way, then fold in half vertically so that the open piece is almost square. To refold in flight, flip it up to be full height and just "turn a page." It is always complicated going to the other side . . . I always use the facgtory creases, but not always in the factory direction.
I keep sectionals folded up between the front seats when traveling, as I almost always need two and sometimes three. Highlight the route, fold everything up, stack in order of use, and stand up between the seats. Grab the first one; when it's finished, it goes in the back seat or floor to keep me from accidently grabbing one that I'm done with instead of one that I need.
Pen lives in my shirt pocket or clipped on where I can grab it. Another pen is attached to the panel, where I can also grab it. Plotter lives in a side pocket by my knee, where I can get it if needed. You'll need your whiz wheel or E6B somewhere easy to reach for the checkride, so find somewhere convenient and make it a habit now. Seat back pocket? flight bag on right rear seat or floorboards [where you can easily reach it]?
Want to impress the examiner? Print out the Airport Information Sheet from AOPA Airport page [click Kneeboard Format up near the top]. Highlight things like frequencies, runway length & numbers, write in pattern altitude. Fold it in half [thus the kneeboard format] and put them in the order that you will visit them. This is a great way to prepare yourself in advance, and it provides an easy review before arrival.
It's not detailed enough for your PPL checkride, but here is one of my nav logs for a trip home from south Florida [there's a 2nd page, about half full for this first of two legs; the second leg is similar]. Notice there's space to record frequencies as I am handed off, which I write down then read back, and also to record weather. Yes, it helps to write small, but this is the first real benefit after a lifetime of ridicule. You can do something similar, I'm sure. Yes, I still use a kneeboard and a sectional, and I still carry paper to write on [anything I print out and don't need is folded blank side out and saved for the kneeboard. Recycling is free!]