Deanne's comments strike a chord. I never had fatigue, worked through treatment. But as part of coming to grips with long term side effects, I learned (gasp!) that food and sleep don't automatically build energy, particularly when 12 hour working days aren't uncommon and you are balancing a pile of plates (metaphorically) most days! There's tiredness because you have been busy, there's chemo induced exhaustion and then there's failure to supply enough of the feel good stuff to keep you from running on empty. Cancer treatment causes one but can make one of the others so much more apparent! It's not about winding down but being a great deal more selective about where you put your energy and what boosts it.