Renew
It's important to focus oneself in winter so that one can emerge renewed! You can't really go outside in winter without getting cold or sick, so spend winter focusing on YOU.
Imagine sitting in your house all winter, meditating and thinking about how you can renew yourself.
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Winter ends and, renewed, you come out ready to start a new hobby: kayaking (かい)! Nothing says renewal like a brand new kayak and sense of purpose in life.
Imagine being back in your house in winter. You're thinking about all the kayaking you're gonna do when winter ends. You're even making the movements with your arms, so you'll be a really renewed you.