A lot of us like to be greeted. A smile, a gesture or a nod is all it takes sometimes to make someones day. When you add a name to that greeting the experience is more memorable.
When I am introduced to someone I always really listen to their name and really focus on their face. If it is a name that is hard for me to pronounce or if I don't hear them very well I ask them to repeat it. That way I have heard their name at least twice. When we part company I close the conversation with their name. Afterwards I mentally focus on their name and visualize what their face looks like. The next time I see them I greet them by name and look at them directly. If I have forgotten their name I ask them to refresh my memory, and I once again make a mental note. The next time I always remember their name and face.
It is very important to me to remember names and faces. I want to greet others like I like to greeted. By name and a with a warm smile!