I recently did this sheet to print out to be used as a basis for discussion at a local children's group, which was very interesting.
The discussion was about dealing with unkind comments, like "I'm more clever than you".
The idea was to think about the sort of comments and behaviour that may not be classed as bullying, that falls into a bit of grey area there, but that is still unkind and unfriendly.
The kids were asked to think of responses that wouldn't exacerbate the situation or get them in trouble, but that would be confident and assertive.
There was a lot of 'walk away', ignore them' and 'don't show you're annoyed'.