Praydio.com plays one of my favorite songs about praise. It's by Keith Green and it's called "Make My Life A Prayer to You." I'm convinced that a life that's lived as a prayer—a life solely dedicated to the Lord in intimate interaction—is the highest form of praise a believer can give to Him.
Praise is far more than singing songs to stir up emotions and make us feel good; it's giving high honor to a most Holy God in any way that glorifies Him. It's an expression from those who understand the adoptive covenant they are in through the cross of Jesus, so they lovingly give grateful heart expression in response to that covenant in any form they can. It's a life style!