What is true "praise?"

Last night I asked my high school students "what is praise?" Here are some of their answers.

Worship. Prayer. Giving your heart to the Lord. Saying God is good even when life isn't. Thankfulness. Contentment. Seeing the beauty in things. Giving your “bad stuff” to God. Making a connection to God. Something you do every day, every minute. Lifestyle. Exaltation. Adoring. A compliment the person already knows, but you give it anyway. A compliment because of who or what makes them “them.” Your life and your actions. Encouragement. Love. A hug. Dancing. Running. Everything can be praise.

I just thought that was cool. And here's a quote from a book I've been reading: "What if we were so moved by who God is, what He's done, what He will do, that praise, adoration, and worship continuously careened in our heads and pounded in our souls?"