As your employer, it's important to express your appreciation and gratitude for their contributions to the company. Consider something thoughtful, personal, and meaningful that shows your understanding of their needs and interests. Some ideas include a handwritten card expressing your appreciation for their leadership, a unique and personalized gift that aligns with their hobbies or interests, or a special gesture such as taking them out for lunch or organizing a special event in their honor. Whatever you choose, make sure it reflects your sincere appreciation and appreciation for their contributions.