Sometimes when less than happy, I will notice that probably some fear is present. I will look at the "fearing" itself and to some degree this shines a light on it and dispels it. Just even admitting to being afraid is helpful.
But what I recently discovered is that when I am less than happy, it is possible to actually notice that I'm believing not just in fear and guilt, but in sin. If I recognize this and look at the sense or feeling of "its a sin" or "sinfulness" or "I am sinful", which can express itself in any form of guilt or fear or emotional upset, I am quite surprised how rapidly a tremendous weight is lifted. It's like a dark veil is just lifted right up and all of those symptoms just disappear.
If sin isn't real, then everything that came from sin must go with it - all the guilt and all the fear and all of the unhappiness. It's like unplugging the problem at its core.