HOW TO WRITE AN INFORMAL BUSINESS LETTER Step1 Use writing that is breezy rather than casual. Be brief, straightforward and logical. Step2 Employ standard grammar, spelling and formatting rules, but relax your tone and construction slightly. Step3 Use contractions and conversational phrases to soften the letter. Step4 Begin with the date, both your address and the recipient's (or just your address) and a salutation. Step5 Choose "Dear" over "To Whom It May Concern." Step6 Place a comma after the salutation ("Dear Jane,") instead of a colon. Step7 Use personal statements to make the letter less formal: "I agree with your assessment of the highway construction project. I too commute that way." Step8 Close with "Best," "Cheers" or "Regards," rather than "Sincerely" or "Thank You."