Compose a thoughtful dedication or acknowledgment in a published work. If your professor helped you with your thesis or dissertation, recognize his contribution to your work in your dedication or acknowledgment section. Discuss specific ways your professor helped you complete your work -- perhaps his expert knowledge on the subject helped strengthen your understanding or his strong command of the English language improved your writing.
Nominate your professor for a faculty award at your school. Many colleges and universities honor outstanding achievement from faculty members annually. Earning this award will show your professor the impact she had on your academic career, not to mention show her superiors she is doing an outstanding job with her students.
Write a note of gratitude to your professor. Your professor might not realize the impact he had on your education, so you can honor him by telling him how appreciative you are. Cite specific examples that outline how your professor impacted your education or what he taught you.
Nominate your professor for an award through a professional organization. For example, the Marketing Educators' Association offers an annual Marketing Educator of the Year award. If your professor earns this award, or one like it, she can receive national recognition, which could help her advance her career in academia.