Heart brain interaction is extremely interesting stuff. Love, compassion, and gratitude can have a profound positive effect, not only on our own bodies, but our relationships as well. HeartMath is a really cool piece of science. This quick little video, spells out the heart-brain connection rather nicely.
Do you feel like a grump when you wake up? Using the Emotional Freedom Technique is a fun idea What is your emotional state when you first wake up?