Personally, I think I manage to do two things regularly that while they may not exactly fall into the category of
kindness are, I think, examples of
consideration
1) I think I am generally a considerate driver. I tend to let people out of side roads, let pedestrians cross in front of me etc. It sometimes amazes me to see the look of disbelief on their faces when a driver actually gives way to another road user or pedestrian
2) If I have had particularly good service in a shop or somewhere where tipping or other gratuities are not the norm, I make a point of finding the manager and complimenting the member of staff to him or her.
Just my 2c