Early in my ME encounter I was told to avoid "Boom and Bust" and to aim for day to day consistency. I was also given the advice: "Do only 60% of what you can sustain without producing symptoms". Now these two bits of advice are excellent, but not at all easy to achieve. After all, if I really DID do so little, as to never produce symptoms, then how would I know if I was starting to improve? I was thinking about this dilemma recently, and being a science teacher (prior to ME) I couldn't resist a few graphs to help me think all this through! Perhaps they'll help you too? http://sallyjustme.blogspot.co.uk/2014/09/play-up-and-lay-up.html Does this help?