One of the best things about being alive is the ability to slide beneath freshly washed and scented bed sheets after a long day of doing things you probably wouldn't have done if you didn't have to.
Another one of the best things about being alive (and being able to hear and smell) is the ability to hear the sound two orange chambers make as they rip apart, and to smell resulting spray of citrus.
Also good: back massages, and the gentle whir of fan blades.
Fall is the perfect time of year to experience good things. I would recommend walking around in a local park, and listening to the sounds acorns make as they drop on the fallen leaves.
My sons and I play a game every Fall. We go to a local tree park, and try to catch the leaves as they come down, before they hit the ground. It's more fun later on in the season, when you are wearing jackets and the wind is more unpredictable.
Are there jazz musicians that play on the street corners in your city? Go listen to them, and drop alot of dollars into their instrument case. If you are a regular church goer, put your weekly donation in the instrument case of a local street musician instead of giving it to your church. It's a better investment, trust me.
Picnics are great in the fall too. Some cheese, some bread, some grapes. A couple of sodas. We live near a small airport/bike trail, and there's a perfect hillside for picnics. Eat, and watch the planes take off. What could be better?
Also good in fall: Walking through graveyards. I will walk through several graveyards this fall. The older the better. There's a graveyard across the street from the aformentioned airport bike trail that is home to the first citizens to set up camp in our area. Many of the stones are feeble, many mark the resting places of young people that never made it past the age of five. The words are fading, and the ones you can read bare many touching rememberances. One gravestone simply says this after the person's name: BORN IN FRANCE. Died. What else could you need to know?