Religious scholars advise Muslims to think before speaking. Taking time to ask oneself the following questions will help avoid vain speech or idle talk:
•"Will this saying of mine please Allah?"
•"Will this saying of mine bring me closer to Allah?"
•"Does this saying reflect obedience to Allah?"

If a Muslim feels at all uncertain, he should keep quiet rather than risk saying something which contradicts Islamic belief or behavior. This doesn't mean that a person can't engage in casual conversation, but rather that he should guard his speech and choose his words carefully