Beat me to it.
Excuses are like pimples – everyone has them as long as we are immature, they are an ugly thing, but when we grow up, they disappear.
Excuses are the nails used to build a house of failure.
No one ever excused his way to success
Doth make the fault the worse by the excuse
Never ruin an apology with an excuse
He that is good for making excuses is seldom good for anything else
The person who really wants to do something finds a way; the other person finds an excuse