Begin with the crucial information, such as your name and the title of your submission. Then make sure the file is attached and it is correctly named. Tell them what makes you stand out from the other 7000 submissions they received this month.
Make sure you are active on your author platform and that you are communicating with your potential readers and buyers.
Keep the pitch sentence simple, focus on what the book is about and nothing else. Don’t try to write a long synopsis in the pitch, as it’ll become over complicated and confusing. The shorter and clearer the pitch is the better it will be received.
Include comparison titles so that the book can be linked to established genres, and the marketing can be tailored to the right readers.
Keep a balanced tone. Be confident, not conceited.
Try to put your best foot forward with the cover letter, as first impressions are important.