I am at a conference today in San Jose (BlogHer) and the combination of lack of sleep with intense concentration and networking has left me yawning.

Over the course of the day I’ve had four cups of coffee and it seems to have stopped working. Trying to see if tea can give me a jump, although my comfort association with tea might just put me to sleep.

Do you ever have those days where caffeine just doesn’t seem to work?

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