It really can be as simple as deciding each morning that you are in a good mood. Even if you suspect that it might be a little more complicated than that, what’s the harm in giving it a try?
At the very least you should let go of any upset over yesterday. Don’t ruin your brand new day by thinking about the troubles of the day before.
To recap: let go of the troubles from yesterday, and decide that you’re in a good mood today. If you practice these two simple steps, every day, then you’re helping yourself to live a simply splendid life.