Here is the list of healthy lifestyle habits and science backed tips that can strengthen your immune system to protect you against illness and infections. 1. Exercise Regularly 2. Get enough Sleep 3. Stay hydrated 4. Eat Seasonal Fruits and Vegetables 5. Maintain Healthy weight 6. Minimize Stress levels 7. Stimulate your immune system through required Vitamins intake. Share your tips and healthy ways to boost the immunity.