Smile slowly for maximum impact

When you greet someone, pause and look at their face for a second.

Flash a big, warm, responsive smile over your face.
A few seconds of delay convinces people that your smile is genuine and only for them. This will make your personality appear richer, deeper, more sincere and credible, and special for the recipients.

When meeting groups of people, grace each with a distinct smile.
Let your smiles grow out of the beauty you find in each new face. If you flash everybody the same smile, it loses its value.

If one person in a group is more important to you than the others, reserve an especially big, flooding smile just for him or her.