Reducing carb intake, selecting smart carbs (unprocessed foods), walking 1 hour after eating, intermittent fasting (stop eating after dinner) drinking lots of water, supplements like cinnamon, chromium, magnesium, etc. Get a blood meter and check before eating to help make better choices, 2 hours after eating to see the effect - journal what you eat and results. 6.2 isn't terribly high but it is above normal. Shame they didn't tell you. Always demand a printout of your full labs, ask for a urine sample too