As the new boss, you may want to write a message of gratitude and appreciation for your staff's hard work and dedication throughout the year. You could also include a message of hope and optimism for the future, expressing your confidence in the team's ability to meet new challenges and continue to achieve success in the coming year. Additionally, you could acknowledge any specific achievements or milestones that the team has accomplished and express your gratitude for their contributions. It's always a good idea to keep the message short and sweet, and to tailor it to your specific team and their unique circumstances.