Dear client
Do you work from home or go to office? If you have to reach to office you can use cycle or walk and jog to work. Else you can go to a gym on your way home.
You can carry homemade lunch and dry healthy snacks or salads with you.
You have not mentioned about family members and marital status. They can motivate you to stick to your schedule.
Next Steps
You can get your eyes checked.Can use spectacle or anti glare goggles. Also you have to use blue light filter settings on your digital equipment. Blue light delays sleep.
Health Tips
Keep your screen time to minimal possible. Get up from your seat every 45 min and walk around your cubicle for 5 min.Exercise your eyes by concentrating on pointer finger and then moving it away and towards face alternatively.