I often get into these modes where I just mindlessly stare at things and feel nothing and think nothing and it is as though I am wasting away and everything and my mind has gone blank.  I lose track of time and the sense of it; many times I will feel as though only 5 minutes has gone by and it has actually been an hour, and other times I'll think an hour has gone by and that is has actually not even close to that.

It is weird and discouraging how easily that can happen after a relatively good day.