I subscribe to the line of thought that if you always tell the truth you won't have to remember what lie you told. This is so important in Real Estate or any other customer service field. Lying is so uncool !
I vaguely remember the movie LiarLiar but I do remember enjoying it and loving the message. I really liked Jim Carry on SCTV but not so much as Ace Ventura. I was glad he seemed to grow up a bit for LiarLiar.