Accept your mistakes

The only way I tell a lie is by not telling the truth. Otherwise, I find telling a lie and trying to keep it intact is very tiring and demanding process. Some of my friends and relatives, whose lies i can see through have always said the chance of one getting away with a first lie is greater (i.e you dont have to say many lies to save the first lie). So, its worth a shot instead of facing the consequences. But then i have seen them pay a very high price for the very small percentages of lies which went on to become a big problem. So, from my point of view it is better to accept any mistake and face the consequences.
In reality, we dont face ego-shattering, life-threatening and moral-dilemma situations often. So, if we practice telling truth in that situation, it would be easy for us to say truth in trying times.
Look at what Scott Adams did. Whether he intentionally did this or not is not our botheration. Accepting his mistake is the best way out. You could see many comments where the audience empathizes with him for self-plagiarism.