I had kung pao shrimp for lunch (I rarely eat shrimp, but I let myself have it as a treat) and it helped. I think I'll go make a cup of peppermint tea, read on the iLiad for a bit, and then get some sleep.
Sometimes caffeine actually helps, but then I can't sleep, and I need to sleep to keep in good enough health to avoid getting a sinus infection on top of the allergies!