Go to terminal. Decide to buy book or magazine. Look for book/magazine store. Leaf thru available choices. Narrow it down to 2 or 3. Go for a walk and think about it. Decide to get a snack while trying to decide what book/magazine to buy. Look at available snack choices. Narrow it down to 2 or 3. Go walk around and make sure you have seen every available snack that is for sale. Make snack decision. Buy snack. Eat snack. Realize you need a drink to go with it. Look for drink choices. Narrow it down to 2 or 3. Debate between bar/cafe/sitdown place or buy-and-carry or vending machine. Decide. Buy. Drink. Return to book/magazine store and think about your choices some more. Finally, decide. Buy. Go to comfy place to sit and wait and read (after all that walking, you have picked out some nice comfy spots). Read and enjoy your magazine. Finish. Glance at listings of flight arrivals. Note that arrival time has been bumped back a few hours.
Repeat.
(This is what I usually do.)