For past two days it has been delightfully sunny in San Francisco, but inside of me is gray with the devil grumbling. Such is the curse of the summer flu. Flu is my one true kryptonite and it brings me down at least two or three times a year. It typically happens when there is a 10-to-15 degree variation in temperature. Good news: it doesn’t last for long and hopefully I will be recovered by the time work week rolls around.