A 62-year-old man with a history of chronic stable angina and a remote myocardial infarction comes to your clinic for follow-up. He has hypertension, hyperlipidemia, and type 2 diabetes mellitus. He smokes one pack of cigarettes per day and has done so for 40 years. Current medications include aspirin 81 mg daily, metoprolol 50 mg twice daily, and atorvastatin 80 mg daily. Blood pressure is 130/78 mm Hg, heart rate is 68/min, LDL cholesterol is 70 mg/dL, and hemoglobin A1c is 7.2%. Which of the following interventions would most reduce his risk of future cardiovascular events and mortality?