I agree with everyone else and what they've said, but I also am conscious of how I am going to say or do something and how that will impact another person....kind of naive I guess, but I try to live by the line in Bath's signature.
I have 2 'trades' and in both of those you become acutley aware of your impact on others. I guess for me it was always there (compassion) but it's been honed somewhat.
I also think tact has a lot to do with it do. You don't have to have compassion for everyone everywhere, but it can be conveyed without heartless thought IYKWIM, just by using a bit of tact.