This Creates happiness

Feel your emotions without fear or labeling them.
Mentally stop your worry habit, it's a habit you have trained yourself to do.
Spiritually, read your bible everyday and actually believe and practice the spiritual self. Love yourself.
Physically, go walk a little everyday until u can walk a half mile, then just go a little further every week. The endorphins released from your exercise will make u smile without having to make yourself smile.
Of course the emotional, mental, spiritual and physical acts will all make u do that.
And through self will and effort, this creates happiness.