Do Qigong, Yoga or Tai Chi in the morning. Avoid consuming caffeinated products after 11am. It is best to avoid caffeine completely. Minimize intake of sugar; pungent or heavily seasoned foods; and spicy foods because they easily create Heat that rises to agitate the mind.
Allow sufficient time for the mind/brain to rest at night. If the brain is overactive, practice meditation at night. Do not eat late at night. Allow 3 hours after dinner before going to bed. Smoking cigarettes or tobacco products close to bedtime can make it hard to fall asleep. Alcohol makes you fall asleep initially but disrupts your sleep later in the night. Try to be in deep sleep from 11pm to 7am.