You've already begun to look at your own process and bigger picture issues, as well as the extensive practical information about the kinds of sustainers which work for you. For some of you, the chance to take a few moments to look at some basic definitions of stress may be of help (** on the other hand, if you're stressed out enough that reading about definitions of stress would be a huge waste of time for you, feel free to click on another of the chapter headings above -- remember, you're in charge). These certainly aren't all of the definitions out there, but we hope you find them useful.