Choose your travel days to get the most out of your fares. Most times Tuesdays, Wednesdays, and Saturdays are the least popular travel days for domestic flights. This may work in your favor when booking your next flight.
Fly in the morning, if you can. There is less chance of a flight delay in most places. One notable exception is San Francisco where the fog often delays early morning flights. It burns off by late morning or early afternoon.
Get to the airport early. Check before you leave home if your flight is delayed or on time.
Allow at least 45 to 60 minutes for a connecting flight when booking your flight. This will vary by airline and by airport. At any rate, allow enough time to not be stressed out by missing your flight.