If at first you don't succeed, destroy all evidence that you tried. If at first you don't succeed, redefine success. If in doubt, mumble. It's always darkest just before it gets pitch black. It's not whether you win or lose, it's how you place the blame.
Mistakes are often the stepping stones to utter failure.
Never do today what you can put off until tomorrow. Never put off till tomorrow what you can avoid all together. Never put off until tomorrow what you can do the day after. Rome wasn't burnt in a day. The light at the end of the tunnel is the headlight of an approaching train.