The "best" way is to first make up your mind that you are going to lose weight.  Then you set a "reasonable" weight loss goal within a "reasonable" period of time.  You know your own body and health condition,  If you feel the need to consult a doctor, then do so.  If you don't think that is necessary then ... it's your body, it's your life, it's your responsibility.  But I can tell you a true story.  I knew a woman who was overweight.  She said she tried all kinds of diets but nothing worked.  She finally went to a doctor.  Turns out she had an overactive thyroid gland.  Once the doctor operated, she immediately loss weight.  When I saw her after surgery, I almost did not recognize her.  You can try one of those diet plans like Weight Watcher, South Beach, etc.  Former President Bill Clinton said the South Beach Diet worked for him.  (mayoclinic.org/healthy-lifestyle/weight-loss/in-depth/south-beach-diet/art-20048491)  You can search YouTube.  There a bazillion videos on how to lose weight and keep it off.  Some of those videos are advice from healthcare professionals. Bottom line? The "best" way to lose weight is what is "best for you.