I'm good about this when I'm healthy, but really at sea when I'm rehabbing an injury (like my hands/wrists now). That 30-minute rule is helpful to keep me from overdoing it twice at the same stage of recovery, but I'm not sure how to keep from getting there in the first place. It also doesn't help that I often don't experience mild pain as pain at all, until after I'm completely healed and realize how much the pain was dragging me down.
... but 30 minutes after cutting up a chicken (except for making DH split the breast) - the most I've done in the kitchen since my crash - my hand doesn't hurt any more, so that's good to know.
Speed comes from what you put behind you. - Judi Ketteler