Mark Page References to Save Time
It doesn’t matter which side of the GM screen you play on anything you can do to save time with paperwork it more time you can spend gaming.
If you’re a player take an extra minute or two when you’re updating your character sheet to include the book and page number for that new feat, skill or spell. Doing so will make finding the write up on it that much easier when it comes time to use it.
If you’re a GM include them for the creatures the characters encounter, magic item descriptions and the feats, skills and spells your NPCs are using.
May your dice roll well.