Keep a blood pressure log by measuring your blood pressure at the same time every day and recording the results along with the times and dates, according to the American Heart Association. It is important to take two to three readings each time, and allow one minute between each reading.
Do not smoke, eat, exercise or consume any caffeine or alcohol within the 30 minutes leading up to the blood pressure measurement, cautions the American Heart Association and Mayo Clinic. Prepare for the measurement by assuming a correct and comfortable posture that adheres to instructions from the blood pressure monitor. Keep calm and do not talk during the process of checking your blood pressure. Seek medical attention if you receive several high readings in a row.