The document provides tips for writing effective LinkedIn InMails. It emphasizes personalizing messages by mentioning common connections, groups, employers, schools or interests between the recruiter and candidate. It warns against asking for resumes in the first message or pitching roles below the candidate's level. The document advises sending InMails on weekdays between 9-10am in the candidate's time zone. It also stresses crafting attention-grabbing subject lines and using analytics to optimize the InMail strategy over time.