The document provides resources for writing a thank you letter after a marketing planner interview, including samples of thank you letters, tips for writing one, interview questions and answers, resume samples, and cover letter samples. It recommends sending a thank you letter within 24 hours, addressing each interviewer individually for a personalized touch, using the letter to reiterate your interest and qualifications for the role, keeping the letter short and simple, and proofreading for errors. Additional free resources for the job search process can be found at the listed website.