I'm leaving my job after 20 years and don't know how to say goodby to my employee.
I gave thank your cards to my close colleagues or took them to lunch. We are still in touch and good friends.
A heartfelt card and message and hug.
A book with a card saying the reason you selected it for them?
I would do like a little goodie bag type thing of what they like? Candles, Candy, Perfumes, Lotion? And a personalized thank you card for being a great employee while you worked together. My old boss got me redbull when she left since she knew I loved it and a cute card. Still cherish the card :)