Be appreciative

Thank you...thank you...thank you...

Does saying 'thank you' means that you appreciate someone? Especially s/he had helped you?

You know...sometimes we said too much of something, it becomes a routine, just out from our mouth, but it does not mean that we meant what we said. After sometime, hearing too much of such words, like 'thank you' from people, makes you feel that they don't mean it, it's not really from the heart, but just saying it for the sake of saying it.

The other word people commonly like to say in this part of the world is 'sorry', sounds like 'sorry' or an apology, but really, do people mean what they say?