Look for the joy in each and every day. Just because it isn't immediately obvious, that doesn't mean it's not there.
Remember: it's good to be alive
Make a point of acknowledging something good or positive each and every day. Rather than making this a bedtime activity, try doing it at two or three different times during your day. It's so easy to be caught up in the hustle and bustle of life that if you don't stop and pay attention, you might not notice how good it is just to be alive.