Some people need to read this article. Key things to say in an apology:

I’m sorry for...
This is wrong because...
In the future, I will...
Will you forgive me?

I know that apologies mean a great deal to me, and I hope I myself say "I'm sorry" enough. This is another level of apology, and it's one I'm going to ponder and try to use myself in the future.

http://www.cuppacocoa.com/a-better-way-to-say-sorry/