Self-care is also a part of productivity. You cannot be productive if you are worn down. I think our society gives too much praise and credibility to the idea of always being busy. It isn't normal. There must be balance. Our bodies need balance and more importantly, our minds need balance. Rest. I know that I must recharge and often...unplug. There is often too much stimulation. Once I do that, then I find that I am much more productive. It is okay to say no to that invite or to that project. Just have to listen to your body. It has limits. No one should feel guilty for doing so.