“Thalia’s themes are humor, festivities and recreation. Her symbols are party decorations. Among the Greek Muses, Thalia is the Goddess of festivity and humor. She inspires today’s Feast of Fools celebration with unbridled revelry and joyfulness to round out year on an upbeat, playful note.
During the Middle Ages, around this time of year, a mock religious ritual called the Feast of Fools took place, much like the impious Saturnalia. Normal roles were often reversed and reverence went by the wayside, replaced by fun and pleasure. I see no reason not to follow the example of our ancestors and give ourselves time to frolic a bit today. Do something that energizes you, inspires you or makes you laugh out loud For example, throw yourself a party complete with silly decorations and hats. Watch your favorite comedy flicks with a friend.
Or, go out dancing, play video games, socialize with folks who make you feel good and generally let Thalia live through (and in) your pleasure.
To keep Thalia’s playful, enthusiastic engry with you, bless an amethyst (for joy and luck) saying:
‘Thalia, inspire my humor and muse;
throughout my life, joy diffuse.’
Carry this with you anytime you feel your sense of humor waning.”
(Patricia Telesco, “365 Goddess: a daily guide to the magic and inspiration of the goddess”.)
According to the Wikipedia: “Thalia (‘the joyous, the flourishing’, from Ancient Greek: thállein; ‘to flourish, to be verdant’) was the Muse who presided over comedy and idyllic poetry. In this context her name means ‘flourishing’, because the praises in Her songs flourish through time. She was the daughter of Zeus and Mnemosyne, the eighth-born of the nine Muses.
She was portrayed as a young woman with a joyous air, crowned with ivy, wearing boots and holding a comic mask in Her hand. Many of Her statues also hold a bugle and a trumpet (both used to support the actors’ voices in ancient comedy), or occasionally a shepherd’s staff or a wreath of ivy.” 
Thalia Took writes, “The name Thalia can be interpreted several ways–‘The Luxurious One’, ‘She Who Flourishes’, ‘She Who Brings Flowers’, ‘Luxurious Growth’ are some of them, all encompassing ideas of growth and blooming.
See also my drawing of the Nine done for a newsletter cover.
Took, Thalia. Thaliatook.com, “Thalia“.
Wikipedia, “Thalia (Muse)“.
Eighthmuse.com, “About Thalia, the Mythica Eight Muse“.
Greekmyths-greekmythology.com, ‘The Nine Muses of Greek Mythology“.
Herwood, Mary Carol. Voices.yahoo.com, “The Nine Muses of Greek Mythology – a Series – #6 – Thalia“.