If your stationery does not include your printed address, place it in the upper right-hand corner of the first page. Follow one or two lines below with the date. If your address is already printed, the date is placed in the upper right-hand corner of the first page.
The best letters will share news and information, mix good with bad news, respond to the questions asked or news shared in a previous letter, and ask about the recipient. Include only information you would be happy for others to see. It is more likely that a mailed letter will stay private; e-mailed ones can easily be forwarded inadvertently or intentionally.
End a letter with something positive and if you can, wind up the letter with something your correspondent can relate to.