Create some daily blessings, a peaceful evening bedtime ritual and an inspiring morning wakeup ritual. As mentioned Bryant, eating right is important. Fuel source or amount may effect sleep and sleep effects mood. Serotonin and dopamine levels, hormones that effect mood, are also stimulated by exercise, foods ingested, and daily blessings.
For my wife and I we meditate for about 20 minutes before we go to bed. It helps to clear our heads and focus on the next day. This way when we wake up we are already in the right mind set for the day. We also make sure we wake with enough time to get ready with out having to rush. I also like to do about 10 minutes of body weighted exercise in the morning to help get everything moving. coffee is good also. I agree with what others have said- say 3 positive things about yourself, or expressing gratitude is great!!