I don't usually put clips that aren't done by the contributors or myself, but I think this clip, by Baloche, is one that everyone should have a listen to. Here, Baloche talks about what the Bible says about playing excellently for the Lord, and the attitude we need to take to put it in practice.
1 Chronicles 25:7
Along with their relatives—all of them trained and skilled in music for the LORD.
Sing to him a new song; play skillfully, and shout for joy.
Also, check out his other videos.