I think flight attendants (who cycle through flights to lots of countries) will be the main vectors, and you should avoid touching them or things that they touch.
Things to bring:
Things to do:
As soon as you arrive at your destination wash the clothes you're wearing and take a shower.
(People have recommended wearing goggles. I am a bit concerned about freaking out the airline staff and being kicked off the plane for looking like you have a disease, but maybe a sleep mask can do the work here.)
This study suggests some airplane seats expose passengers to significantly more infection risk than others. I'm confused by the writing, but my understanding is that window seats are best.
I would also guess, though I can't tell if the paper is suggesting this, that you're at less risk if you don't use the bathroom, have row-mates, or sit where people are most likely to pass you going to the bathroom. If true, one could potentially reduce risk significantly by buying out a row far from bathrooms, limiting water intake, and sitting near the window.
The CDC does not recommend face masks for people who are not currently sick. The reason it twofold - one is that unless you have fit the mask to your face properly, which is bloody difficult to do and even harder to maintain, it just doesn't work. Any tiny gap in the seal sucks air into your breathing space. Two is that even if you can fit it correctly, you have just spent five minutes touching your face, which ups your risk of infecting yourself.
The Lysol wipes is a great idea. Hand sanitizer is only good for so much - they are anti-bacterial and the thing we are fighting now is a virus. If it helps you remember to wash your hands at the earliest possible time, sure.
I hadn't thought about shower immediately, but that's a great idea.