Make the best of any bad situations. Try facing problems with a positive attitude. Should things go wrong, becoming disagreeable won't help. Nothing is completely perfect. You can choose to either make the experience good or bad.
Some people can get so upset when the least little thing goes wrong.
Let it go, and make up your mind that nothing is going to cause you to have a bad time. Relax and have a good time. Another thing to remember is travel insurance. Senior travelers should check the policy and if they are not covered, they should definitely by trip travel insurance. Do your homework and know what you're getting into by asking before you book the trip.