A health journal or diary helps one keep track of any relevant information about his wellness in general. It is kept mostly by people who have chronic conditions to monitor the progression of the disease, to note the presence of new symptoms, and to keep track of medications. But a perfectly healthy person may wish to make a health journal as well, in preparation for unforeseen health crises that may arise. 1 → Record basic health information. You should include: → Birthday. Sometimes age matters in the diagnosis and treatment of disease. → Height and Weight. → Blood Type. → Blood pressure, cardiac rate, and respiratory rate. Establish baseline data so you can identify sudden changes. → Allergies. This is important because upon admission to a hospital you won't normally be tested for allergies unless the physician feels the need to. Let your healthcare providers know what your allergies are to avoid accidents. → Smoking or alcohol-drinkin...