Telling a lie is really never a good idea. Even a little white lie. If you have to lie about something there's a good chance you've done something you shouldn't have. And when you lie it's usually with people who care about you, and thats never good! You have to consider other peoples feelings, i mean would like to be lied to?
Another thing you have to think about is the image lying reflects towrads you. Say you're trying to get a new job and emploees at that company know you and that you're dishonest then you may have a hard time getting the job. You may even have a hard time making friends.
So is it really worth it to lie?