Southwest Seat Assignment Tip
Regular Southwest travelers have this revised procedure down pat, but if you haven't flown with Southwest for awhile, this advice is for you:
If you're traveling on Southwest, definately check in online as close to 24 hours prior to departure as you can. This is your best chance to get a good seat—not a specific seat assignment, but instead the priority to board early to select a good seat. Also, for excellent priority, check in online on Southwest even if you can't access a printer. You can then print out your priority boarding pass at the airport.