"Serve the Almighty with joy, come before Him with singing" (Psalms 100:2).

The verse is recited daily in the morning prayers. But we have to internalize its message. Repeat this verse as often as possible, while thinking about what it means and how you can apply it.

This is especially important for a person with a tendency towards sadness. A sad person mentally repeats hundreds of sad messages a day. Repeating a verse with a positive, joyous message will serve as a good counter-balance.