Include basic information about your father. Things like his date of birth and information about his birthplace should be included. You may already know everything you will need, but if not, you might compile it by interviewing relatives or friends of your father's, or by researching old family resources such as books or diaries.
Focus the tribute on specific ways your father influenced you, as opposed to telling general stories and anecdotes about his life. Write about lessons learned and fun things you and your father did that still resonate with you.
Conclude the tribute with an expression of gratitude for the things you learned from your father, and maybe even things you still learn from him.