If I travel, what steps should I take to help reduce my chance of getting sick or getting someone else sick?

There's a whole thread about travel in Covid.
Same as what you do at home, wear a mask, wash your hands, stay 6 feet apart.
Take wipes to wipe down "stuff"
There was a feature on NPR yesterday that if you wear a mask the entire time you are on a plane and perhaps an eye shield there is very little reisk ecause of the air filtration on planes--unless you are sitting VERY near a spreader. Wearing a mask is key.