Maintain a calorie deficit
Eat more protein
Reduce sugary foods and refined carbs
Drink enough water
Limit alcohol
Reduce overall body fat
Do regular cardio
Do strength training
Improve posture
Practice neck and chin exercises
Keep your tongue on the roof of your mouth
Get enough sleep
Manage stress
Reduce sodium intake
Chew food slowly
Avoid prolonged sitting with head forward
Consider professional treatments if needed