Peter Greenberg was on Oprah. Some of these tips may be already posted, but not all in one place:

Getting the Best Ticket Price
Peter suggests first telling the reservation agent where you want to go, not when you want to travel. Ask for all of the published fares from your departure to your destination cities. Ask them to scroll down to the bottom of the list to find the cheapest fare and you can schedule your trip around those times. The cost difference could be hundreds or even thousands of dollars.

E-Tickets
An E-ticket diminishes your flight options exponentially — you'll need a "paper" ticket in order to get a new flight if necessary. With only an e-ticket, you'll have to withstand long lines to get the paper ticket you could have had in the first place!

Calling for Arrival and Departure Times
The "scheduled" arrival and departure times are what the airline gives you when you call to see if a flight is on time. Instead, ask an agent to check the "FLIFO" or "flight information." When you find out your aircraft information, ask where that plane is currently located. If your flight is supposed to depart from Chicago in two hours and the plane is still in New York, you're not leaving on time!

Comparing Arrivals and Departures
Don't be satisfied if the departure board says your flight is leaving on time — dig deeper. Virtually every flight says "on time." Look at your gate information on the arrival board, too. If your flight is scheduled to leave from Gate F4 at 1:25, and you see that another flight is arriving at that same gate at 1:16, there's no way you're departing on time! Peter says to do the extra math and save yourself a headache!

Airport Drop Off / Pick Up
If you get dropped off at the arrivals area for a departing flight, there's no traffic. If you're meeting someone who's coming in during peak hours, pick them up at the departures area to save time.

Good Seats
If you're flying coach, you might be able to find some extra room if you can book a "secret seat." A couple seats are designated for crew rest on international flights, but they're likely open on domestic flights. You could get a fully reclining, double-the-leg-room coach seat (with possibly drawn curtains for privacy)!

For example: Peter says an American Airlines 767 has two special seats for crew rest on international flights, but on domestic flights, they may be available — seats 17 H and J.

Air Phone Codes
What if your flight is delayed while you're sitting on the plane and you have a connecting flight? You can't use your cell phone, and you don't want to spend a fortune to use an air phone. Every airline has a two-digit star code that you can use — and it's a free call. Ask the flight attendant for the star code, and talk to the airline while everybody else is worrying!

The Secret Rule 240
If you're going to check in for a flight and it's delayed or cancelled, ask the agent to invoke Rule 240. For any reason other than weather, under Rule 240, your ticket will be endorsed over to the next available flight-not just that airline's next available flight, any next available flight!