A well-written cover letter is essential for standing out to hiring managers. The document outlines 10 tips for crafting an effective cover letter: address the hiring manager by name, use a compelling opening sentence, tailor your content to the specific job requirements, showcase achievements with numbers, demonstrate an understanding of the company culture, emphasize unique selling points, keep the letter concise and one page, close with a call to action inviting the employer to interview, proofread for errors, and consider using a resume writing service for assistance.