So true. Whenever I´m tired I stutter significantly more. Also I´m the type of person that is very demanding with myself. If I train I have to go hard at least 2 hours. When I´m working I have to be the first one in and the last one out. After a very busy day I have to continue working on any other topic on my house. This type of mentality assure that I will be tired and stress out the next day. In consequence I will tend to stutter more. I been trying to know when to stop in whatever activity so it doesn´t become excesive and fatigue me out. Whatever I´m working and feel exhasuted I can continue tomorrow. If I skip one day it really does not mather. Step by step 1 round at a time. God bless you