You. Yes, you.
Put on some gloves, a hat and a scarf, and your warmest outdoor coat. No, not the car coat. The warmer one.
Go outside and walk. Even if you have a cold. Even if there isn't much sunlight left today.
Get out and go for a walk. Take your cane or walking stick, if needed.
This is the time of year that the low light levels of winter begin to do some serious damage. Today there is sun on the East Coast, and it will be gone tomorrow. But I want you to do it all again tomorrow, even in the snowstorm.
Weather is delightfully changeable, and walking is free. It's recession-proof and cheap. And the best medicine for the winter blahs.
UPDATE: walked Ellie to the mailbox during the ice storm. She hated it, but needed it desperately. She's napping now. March 5, 2008