Finish the manuscript, and make sure that it is edited and ready for publishing. Many publishing houses will consider a manuscript only when it is finished, so it is best to have the book completed or nearly completed before getting in touch with editors or agents. Check out HumorWriters.org, the number one website for humor authors, for information about editing services or humor writing advice.
Write a query letter. These letters are the vehicle through which a writer contacts publishing professionals. Queries can be sent to both agents and editors directly. A query letter is a one-page cover letter introducing the writer and the manuscript. Write a query letter that introduces the book. Write a first paragraph that includes a hook about the book. This is the sentence that pulls the reader in. Write a second paragraph including a minisynopsis. Include a brief description of the overall plot and characters. Write a third paragraph that contains your biography. This should include relevant publishing credits, writing experience, and education. Make your letter interesting and detailed. Edit the query letter carefully when finished. Include your contact information.
Research publishing houses that seek humor writing. Purchase the "2010 Writer's Market," by Robert Lee Brewer. This book is a guide to agents and publishing houses, complete with contact information. The book also lets writers know which publishers and agents seek humor writing. Look up "Humor" in the book's index and find the agents or publishers that seek humor content. Write down their contact information and contact them.
Visit AgentQuery.com and search for agents who seek humor writing. Send the query letter to the agent following the specific guidelines on the site. Some agents prefer printed query letters; others prefer emailed letters. AgentQuery.com is open to all users and does not require a membership fee.