8. Visit the toilet; if impracticable at home, have a regular time at business.
9. Have several minutes in the open air, preferably walking.
10. Be punctual at work.
11. As your right by contract, insist upon a supply of fresh air for your workroom with the same emphasis you use in demanding sufficient heat in zero weather.
12. Eat punctually at noon intermission; enjoy your meal and its after effects.
13. Breathe air out of doors a few minutes, preferably walking.
14. Resume business punctually.
15. Stop work regularly.
16. Take out-of-door exercise—indoor only when fresh air is possible—that you enjoy and that agrees with you.
17. Be regular, temperate, and leisurely in eating the evening meal; eat nothing that disagrees with you.