daily word - Name in Vain?

Are you familiar with the commandment that you shall not take the name of the Lord your God in vain? You apply this to profanity which could be considered cheap oaths. Can you think of anything else this principle could apply to? Does your mind ever wander when you pray? Do you ever pray without belief? Do you pray for things that you know are not my will for you, or pray for the misfortune of your enemies, which is in effect a curse for them? I don’t want to discourage you from prayer. I am aware of your human limitations. At the same time you should understand the magnitude of invoking my name and not do it casually.