Patience and a flexible schedule open the door for amazing surprises and opportunities.
Eat foods that are fresh and locally-grown whenever possible.
People respect you more when you try to understand their culture.
You have only become "too old" to dance when your mind decides this. Parallel Proverb: if you think you are too old to dance, then you are aging yourself, rapidly.
Listen to your surroundings. Tune in to bird-song, bug sounds, and other animals.
Make a special time every day to notice something of nature. Because you can.
Ask older people questions. Then listen.
Encourage children to sing and play. (Everywhere in Costa Rica children were "being children". They'd take soccer breaks in the schoolyards every few hours. In many places, they'd be singing.)