Math Is Hard said:
oh.. oh dear!

I have really got to get some skills. All this time and money I've spent at UCLA and they haven't taught me any of the basics I need for a happy life.
Some of the stuff that makes for a happy life in no particular order:
1. Knowing how to handle a canoe and how to tie flies that are good enough to fool the trout, and how to present those flies to feeding fish in a way that is realistic. This leads to the supreme ecstasy of fighting a wild brookie on a light fly rod, and although I release many, a badly-hooked fish or one that appears stressed might get a quick neck-snap, leading to ecstasy #2 - pan-fried brookie served with some steamed fiddleheads on the side and maybe some potatoes fried in bacon-fat.
2. Knowing the behavior of animals, so you can see and enjoy them. Very necessary is skill at marksmanship, if you want to hunt animals for food. If I can't cleanly kill an animal with a single shot, I don't shoot. I only hunt with either a single shot rifle or a lever-action loaded with a single cartridge. The most sobering part of a hunt is the kill and the period of reflection on the life of the animal afterward. My native-american ancestors would point out that all life is connected, and that if we are to eat animals, we have a responsibility to respect and honor them. This leads to the ecstasy of pan-fried venison tenderloins, once again served with sides of potatoes and fiddleheads.
3. Knowing how to tend to the soil so that it tends to you. Soil is not some dirt to grow a lawn on. That is a perversion of land stewardship and a waste of resources. Learn to amend the soil with organic fertilizers, manure, peat moss, compost, etc, so that you can grow your own vegetables and fruits. There are too many ecstasies to list here, but some are: biting into a fresh vine-ripened tomato still warm from the sun, eating string beans raw from the plant (they are a great source of "crispyness" in a green salad), making bread-and-butter pickles, salsas, etc. There's nothing like a larder full of great condiments and sauces that you just can't get from a store. Best of all is the peace of mind that comes with knowing that your food is healthy, without pesticides, herbicide residue, etc.
4. Learning the night sky. There is perhaps nothing more humbling and mind-opening than recognizing that we are just little individuals living on a minor planet in orbit around a plain-vanilla sun in a non-descript spiral galaxy. There are (OOM) probably as many galaxies in our visible universe as there are stars in our home galaxy, and if the universe is infinite (it may well be!) our insignificance is staggering.
5. Recognizing that there are times when we can do very little to change a particular situation, and that there are times when a little bit of leverage can make a big difference so we can be a positive influence. This one is particularly valuable for your peace of mind and mental stability.
I could go on and on, but these are things that have made me happy (ier?) and might apply to others, too.