I think a healthy sustainable mix for maintaining flow over the long haul is probably something like - 4-5 hours coding, 0-2 hours meeting/collaboration, 1-2 ho

I think a healthy sustainable mix for maintaining flow over the long haul is probably something like - 4-5 hours coding, 0-2 hours meeting/collaboration, 1-2 hours email, 2 hours reading/writing, 1 hour lunch