What are some nice ways to say I'm sorry or make something up to someone?

I have a friend who had a fight with her boyfriend and she is looking for a way to say i’m sorry or make it up to him. I told her I would try and think of something or give her some ideas and since Fluther is full of creative people I thought I would ask here. What would be some ways you might say you are sorry to your spouse or someone you were dating but in a way that really seems like you are sorry? Keep in mind I don’t think they are to serious so it shouldn’t be anything to extreme. Also the reason she is apologizing is over something rather silly(in my opinion). It’s nothing serious like cheating or secret abortions etc. etc.