So here's something I've been wondering about.
I go through cycles of productivity like most hackers do. Some days I get a lot done while others are mostly wasted. Some of my productive days involve a lot of output like e-mail, code, discussion, debugging, and so on. Other times it's a lof of input: reading, listening, etc. Once in while I manage to have a day in which the two seem to balance out and I go home feeling like I've accomplished three weeks wort of work.
Is it just me? Or does this happen to other people too? Is that balance a necessary part of being productive?