Gardening! I've been building rock retaining walls, improving the soil, putting in a sprinkler system. All this took about two years. This year, I plant!
I love getting dirty, I love the exercise of doing my own digging and hauling, I love getting sweaty and jumping in the pool, I love to watch my little babies come back in the spring, I love the sense of accomplishment, I love making things beautiful all by myself, and it is the one thing (besides burying my face in my kitties tummy), that stops my mind from racing.
We moved to a new to us house almost two years ago, and the big garden that was here was full of river rock and barberries. It looked like a McDonalds drive through. Two years later, it is starting to look really good. I expect after we have been here for five years, it will be close to where I want it.
It's like one huge lifelong science experiment. You never know what is going to happen. I spend the winter researching and planning, spend the spring digging and planting, spend the summer tackling spider mites and aphids, and spend the fall pruning and cleaning up.
I only wish my husband enjoyed it, too, so we could do it together. But he golfs. Hrumpfff.