GIVING COMPLIMENTS CAN BE TRICKY. When quantity gets confused with quality, compliments can end up sounding phoney and patronising. So, to make them effective, remember:
CHOOSE A TIME AND A PLACE. Slipped into a hurried conversation, they may pass unnoticed. The recipient may prefer compliments to be given in private rather than publicly.
TRY TO MAINTAIN EYE CONTACT. When you are talking to the person, always try to keep eye-to-eye contact.
BE SPECIFIC. General compliments are not as useful, they tend to sound less credible and can also be countered more easily.
GET PERSONAL. Be direct, use the person's name and use 'I' - 'I enjoyed your presentation' not 'that was a good presentation'.
REINFORCE YOUR APPRECIATION. In addition to just telling the person, reiterate the sentiment in writing as often as possible.