Exercise regularly, especially aerobic activity
Add interval training if appropriate
Improve sleep duration and quality
Manage stress with relaxation techniques
Stay well hydrated
Limit caffeine and stimulant use
Avoid smoking and nicotine
Maintain a healthy body weight
Eat a balanced diet rich in whole foods
Reduce alcohol intake
Treat underlying medical conditions
Review medications with a healthcare professional
Practice slow, controlled breathing
Monitor heart rate consistently
Seek medical advice if resting heart rate stays unusually high