Overwintering
As you know from my posts in previous years, I grow lots of plants that are not cold-hardy and won't survive our typical winters here in St. Louis. I can either treat these plants as annuals, let them die each winter and buy them all again in the spring, or I can work to overwinter as many of them as possible.
I don't really have the budget or desire to buy the same plants every year, plus I hate killing plants. So for me there's really no choice: I overwinter them.