Now in anticipation of retirement I've tried to develop some hobbies in advance to keep me occupied. Mountain hiking is one that is not only great exercise, there are so many beautiful places to experience that are only accessible by hiking a few miles. Any trip anywhere in the world can include at least one good hike. Some have mentioned camping, I much prefer a pop-up camper over a big RV. It only requires a smaller vehicle to tow and its much easier to maneuver. A person can take 3-4 day trips and spend their retirement years just exploring the 4-corner states. Another thing about being way out away from the cities is very little light pollution (dark skies). I have an computerized 8in telescope (Celestron 8SE) that's I got last year. After viewing the conjunction of Jupiter and Saturn with my 20-60X spotting scope and seeing the moons of Jupiter I was hooked. The 8 inch telescope allows me to see the cloud bands on Jupiter and the Great Red Eye along with the shadows of its moons passing over the cloud bands. I can see the rings of Saturn clear enough to make out the Cassini Division which is the gap between the inner and outer rings. This is from my back yard. Gardening is another hobby. Feb 21 is the average last frost in the Phoenix area so in the next 2-3 weeks it will be time to plant a garden. There are planting guides available online, just search for your area. You can grow microgreens (bean sprouts, etc...) inside in small containers. If you like to talk, there is ham radio. There are at least 500 ham radio repeaters around the state and every state has several. There are weekly nets at set times on different repeaters where people gather to talk. If you can't put up an antenna at your house, there is a cellphone app called Echolink that will connect to repeaters all over the would through the internet. You'll just have to study and pass the Technician level test. Speaking of studying, you have the greatest information source that's every been available in history, use it. Youtube is overflowing with information videos. Learn a musical instrument, even a harmonica. Learn a new language. You've got time now, why not learn and grow. There's also a multitude of activities to volunteer for. If you have applicable skills, you could assist or even teach at a community college.