White lies and omissions of details have their place.
For example, if I return home after having a rough day and that my Mom is going to ask me "how was your day?" if I'm truthful and discuss how I struggled to interact with certain users (I'm an IT tech), I always end up on the butt end of a negative critique/lecture which I've no patience for, and we generally end up snapping at each others and part ways for the evening. Answering "it was okay" would've spared us both that kind of grief. Honestly, when people ask you how you're doing, they're seldom interested in hearing a negative answer anyways.
I've lied before. I've actually been a compulsive liar back when I was younger. I've found that it's a larger hindrance to potentially be caught in a lie than facing the trouble of being truthful is. I still think omission has its place; some things are more appropriate on a need-to-know basis and bring about less trouble with tactful restraint. But deliberate falsehood - especially for something more important - generally doesn't pay off.
Even when something bad happens, things generally work themselves out.
