If your game is anything like mine, you can easily forget about the various conditions that might be afflicting a character. And frankly, trying to remember the difference between "fatigued" and "exhausted" has sent me running to the back of the Core Rulebook on more than one occasion. So we decided to make a deck of cards that makes keeping track of conditions much easier: Introducing GameMastery Condition Cards!
With Condition Cards, it’s easy for players and GMs to keep track of the Pathfinder RPG’s most common conditions. Did the bard fascinate your party? Is your wizard invisible? Is the fighter bleeding out? Simply hand out the appropriate condition cards to keep track—and you'll also have the rules for each condition at your fingertips. This set of 52 hilariously illustrated, full-color cards allows you to play faster and more easily than ever before. Each card features an illustration of one of our lovable Pathfinder goblins suffering from the indicated affliction.
Paizo Charter Superscriber, Pathfinder Battles Case Subscriber, Pathfinder Comics Deluxe Subscriber
These are especially awesome in a 9-pocket card holder; makes for particularly easy reference.
On a similar note, I've taken to cutting standard Staples sheet protectors almost in half, taping them, and using them to hold the contents of the GameMastery map packs, since photo holders aren't big enough.
Makes it WAY easier to leaf through and find what I'm looking for (or organize them by type).