Unfortunately, one size does not fit all applies when it comes to controlling asthma symptoms. Asthma sufferers experience inflammation and airway constriction but symptoms are different for each person and can change over time. Here are three steps to better asthma control according to Mayo Foundation for Medical Education and Research:

1. Track symptoms. Keep a diary where you can record asthma symptoms. Talk to your doctor about how severe your symptoms are and if they have changed since your last appointment.
2. Check your lung function. Use lung function tests (yes there is such a thing) to assess how well you can breathe.
3. Adjust your treatment. You and your doctor can make changes to your treatment if needed based on your symptoms and lung function test results.

Lung function (pulmonary) tests can help you and your doctor judge how well you are controlling your asthma and may ward off flare-ups. Here is one test you can use at home to keep track of how well you can breath. 

Peak flow meter. With a peak flow meter, you can help detect subtle changes in your airways before you notice symptoms. Your doctor can give you instructions on how to deal with low readings and prevent a flare up.A peak flow meter can be used at home to measure how well you can force air out of your lungs. It helps detect subtle narrowing of the airways before you notice symptoms. If the readings are lower than usual, it’s a sign your asthma may be about to flare up. Your doctor can adjust your treatment based on the readings. Peak expiratory flow (PEF) tells you the fastest rate at which you force air out of your lungs.