When in doubt, immerse yourself in hot water: I always head straight for the bathtub (a whisky on the side doesn't hurt, either).Getting out & seeing people whose company I enjoy & having a good, hard laugh.
A hot cup of tea, a good book, and the leisure to enjoy them.
A nice long walk, long enough to really feel the blood pumping through your veins & to put some colour in your cheeks.
A long drive at top speed, singing at the top of my lungs.
Hope you feel better soon!
D.