I found this comic relevant to some of the things we teach in DBT skills group.
I emphasize the importance of having your "sorry's" reflect something meaningful. Say "sorry" if you've violated a wise-mind value of yours. If you'd like to say something else like "I appreciate your help" say that rather than "I'm sorry for being such a burden". Words matter and their mindful use can affect how others view us. And, more importantly, how we view ourselves.