don't use bed for things other than sleeping

Avoid using bedroom and especially bed for activities other than sleeping. This help our brain to associate bed with sleeping.

References

• Sleep Procrastination: Why People Procrastinate on Going to Sleep and How to Stop – Solving Procrastination
• Assessment of Sleep Hygiene Using the Sleep Hygiene Index | SpringerLink
• Thieme E-Journals - International Journal of Sports Medicine / Abstract