If you live in a place that is often overcast, or has inclement weather that prevents a 30 minute morning walk... perhaps even regardless of that:
HappyLamp in the morning.
Its a fancier kind of bulb that comes much closer to the full spectrum of the light from the sun.
When I was going through a Seasonal Affective Depression ... arc? era? episode? ... that was prescribed to me to help both the depression, and the circadian rhythm disregulation... both of those often reinforce each other.
Basically you just leave it on in whatever room you're in, in the morning, for 30 to 45 minutes.
But yeah, setting and sticking to a schedule involving activities in the morning is also very good!