Let's tackle how to write a letter in proper order, from top to bottom. These steps from EssayExperts are directed toward a formal letter, though recommended adjustments for informal letters are also included.

1. Sender's address - To start, place your full address — including your full name, street address, city, state, and zip code — in the upper left-hand corner. If you're not confident in writing addresses, learn how to write an address properly.
2. Date line - Skip a line and specify the date. Use the date the letter is being written.
3. Recipient's address - Skip a line and place the recipient's full address. For a formal letter, you'll need to include the company name, the recipient's name and title, and mailing address. For an informal, personal letter, there's no reason to include the company name or job title.
4. Greeting/salutation - Skip one more line to insert the greeting. This is called the salutation. In a formal letter, you use "Dear Mr./Ms./Mrs. Last Name:" Formal letters require a colon after the greeting, while informal letters take a comma. For an informal letter, it's fine to use the recipient's first name followed by a comma.
5. Body of letter - Skip a line and begin the letter. In the body of your letter, separate your thoughts into paragraphs. You never want to draft one big block of text. For each new set of thoughts or ideas, begin a new paragraph. Leave a blank line between paragraphs.
6. Complimentary close - Skip one of your final lines to include a complimentary close. The closing can be as simple as, "Sincerely," "Yours truly," "Regards," or similar. There should always be a comma after the word or phrase you use to close a letter, whether it is formal or informal.
7. Signature text - Skip three lines (where you'll insert your handwritten signature), and type your full name. For a formal letter, you should also include your job title on the next line.
8. Attachments - If you're including any attachments with your letter, skip one more line and type "Enclosure." If there's more than one attachment, indicate how many there are in parentheses, as in "Enclosures (4)."