1. You do not have to thank personally. Face to face acknowledgment is always better but a thank-you e-mail will please employees more than if you remain silent.
2. Try to thank unexpectedly. At the end of the year or after the busiest season, it is important to thank your people. It is, however, not surprising. Why not thank your staff on the occasion of their birthday?
3. Be creative. Try to search for fun way to thank and be as personal as possible.