I'd say Make sure to Read PassPorter from Cover to Cover, Highlight and/or Put Sticky notes on important info/pages.
I'd also say make sure since your plans can easily change to start by filling in all the Worksheets and Passpockets first with Pencil and then with Pen when they Are Finalized.
(I learned that 2nd Tip the Hard Way)
Another Tip I'd give (if your flying to WDW) is to look over your worksheets, passpockets and notes on the trip down. That way you have everything fresh in your mind when you arrive.
One more Thing- Always keep your PassPorter with you at all times once in the "World"
Even at the times we did not think we needed the passporter I would think of some tip or suggestion in the book that I'd like to use only to find I do not have my Book so now I always keep my PassPorter with me.