One of the things I have to always be aware of while having Fibromyalgia, is that after standing or walking around for a while my legs begin to hurt and I need to rest. I need to know my limits and plan my day accordingly.
We all have our limits, for our energy or patience or attention span, etc. Everyone has different limits. Mine will clearly be less than others, but may be greater than others. The point is that if you know your limits you can plan your day and week around what you know you can handle.
It will also help you choose the right job. If you have little patience, then working with challenging young people, for example, will be a bad mix. If you have a low attention span, work that changes repeatedly will suit you well. Knowing your limits will allow you to work and play to the maximum benefit of you and those around you.
The Fullfilment Project 