Your words have power, so speak words that are kind, loving, positive, uplifting, encouraging, and life-giving.
You can see the definition, synonyms, and other info about today's word at http://www.dictionary.com/browse/Jolly
When you use words you don't normally use you make new neural pathways in your brain, which leads to new thinking, which usually makes you think better. Try using today's word multiple times today and see what happens.