Meditation helps a lot in my experience.
Beginner Theravada Buddhist meditation:
Sit upright but relaxed in a chair (or a meditation cushion if you have one).
Either close your eyes or have them half-open if having your eyes closed with cause you to doze off.
Pay attention to your breathing, either the sensation of air through your nostrils or the sensations of the expanding and contracting of your abdomen and/or chest. Do not force attention, just maintain an awareness of your breathing.
If a thought, emotion, or mental image distracts you, note it and return attention to your breathing.