Don’t check bags
Now’s your chance to travel light. Checking bags is expensive, and should your bag be lost, customer service will be less than agreeable. Sizing standards for carry-on baggage vary among North American, European, and other continental carriers, so get yourself a small, sturdy bag. Your roller might be denied in the cabin, and if that happens, they’ll hit you with another fee -- Spirit charges 100 smackers to check at the gate.
Try the shoe-bag packing trick
The Pack Light philosophy leaves little space for extra shoes, which, if you’re a runner or hiker, can prove tricky. The secret: Tie the extra shoes by the laces to your personal item. That way they don’t fall prey to baggage size restrictions, and you’ll look like a fitness-minded retro-hobo.
Actually, just wear as much of your luggage as possible
A $30 excess-baggage fee will put a damper on your $8 Ryanair ticket. Sometimes it’s worth putting on a few extra sweaters and leggings under your jeans to keep bags light -- and now you won’t have to worry about getting a blanket, which they’d 100% charge you for.
Be prepared to be much more patient
You're allowed to get upset if an expensive airline has major delays or if you paid for extra leg room and didn't get it, but the motto for every discount airline is "go with the flow." Sixty bucks to fly cross-country is a pact with the devil and you know it. So just do your best to chill, man.
If you have a problem, take to social media
Tweet at them. Spirit’s actually an OK airline, in the grand scheme. Take the time they canceled my flight because of a pilot strike. They booked me on a flight leaving the next day and gave me $50 for my troubles. Not exactly a ransom, but it was something. Neglectfully I let the voucher expire, so I tweeted at Spirit (which was once, but is no longer, an autopilot account) and turned on the charm. “I love you guys, you’re the best, you’ve always been so helpful, much more helpful than @AmericanAir. What can you do for me about this voucher?” And they gave me a new one. And on Spirit, I mean, hey, $50, that’s like a round-trip flight to Miami for one tweet.