Make it worthwhile.
If the effort to motivate is not worthwhile, you will find you have in fact DE-motivated them. When I started in the IT industry, I had worked hundreds of hours overtime on a particular long-term project, and then got a bonus that worked out to be 2 cents an hour. The bonuses were the joke of the office. If they had given us an extra 3 days of annual leave it would have cost them the same and we would have been thrilled. One of my coaching clients said, "I can't bear the thought of getting another movie ticket for doing a good job. It is such a waste."
Sometimes the "token gesture", while well-meaning and with good intent, does more harm than good. Make sure that what you are doing is worthwhile for the team member and not just going through the motions.
Sharing what is shared with me.