There were no more joyous days for the people of Israel than the Fifteenth of Av and Yom Kippur, since on these days the daughters of Jerusalem would go out dressed in white and dance in the vineyards. What were they saying? "Young man, lift up your eyes and choose wisely. Don't look only at physical beauty. Look rather for family, 'For charm is false, and beauty is vanity. A reverent woman is the one to be praised!'" 
—M. Ta'anit, 4:8 (quotation from Proverbs 31:30)

Today is Tu B'Av, the fifteenth day of the month of Av.  It is a minor holiday whose theme is love. Some have called it the "Jewish Valentine's Day."

There are no mitzvot associated with this day–nothing you are required to do, nothing from which you are required to abstain. It's just a day for love and joy. 

Do something intentional today to make yourself a little bit extra joyful. Put on some clothes that make you happy. Get a massage. Give your loved ones an extra kiss. Make yourself happy for your own sake, for the sake of those around you, and for the sake of God and the world.