First, sing! That’s gotta work.

House Sparrow 

If you’re more of a leafy type, you might try this neat trick: as your photosynthesis slows in the fall, you make red pigments instead of green ones, like this:

Oregon Grape

Mid-summer, these leaves are a deep green, almost blue at times. This image was made a week ago.

Don’t worry: you can’t help it. It’s a natural consequence of slow photosynthesis! No effort required. But the red colour does absorb sunlight and dissipates it as heat, which protects your damaged photosynthesis process and keeps it functioning, although at a reduced rate, for as long as possible. During the winter, and this is the great part of it all, the red colour continues to transform sunlight into heat, which means that it warms you up in the spring and you get a big head start, especially if you have rock behind you (as the plants above do) to capture that heat and shine it back on you. Ah, that hits the spot! But, still, you can always sing.

That’s bound to do it.