There are many people who are not able to express their feeling and they say sorry for their doings which has a negative impact on the others. If you wish to make others smile and feel good from inside then you should avoid saying sorry and express yourself by saying Thank You.
Yao Xiao comes up with some great ideas of saying thank you to the people rather than expressing your grievances by saying sorry. She has come up with a comic explaining how saying Thank You can work wonders for you and also overwhelm the others. It is also a great way of boosting your confidence.