Begin your letter by writing your name and address in the top right-hand corner of the page. It is important to include this information in case your return address (on the back of the envelope) is torn, or the envelope is thrown out. This way the person who receives the letter will always have your address and will be able to reply to you.Next, write the date on which you are writing your letter. This goes on the left-hand side of the letter, just above where you will write your greeting. The date is important so the person who is reading it knows when it was written. It is also helpful for people who like to keep letters they have been sent and look back on them.Under the date write your greeting. It is acceptable in a friendly letter to be informal with your greeting. Depending on how well you know the person you are writing to, you could use "Dear", "Hi" or "Hello".Now it is time to start writing the content of your letter. This is where you put everything you want to include in your letter. Remember, if you forget anything you can always put it in the postscript.When you have finished writing your letter, end it by signing off. Depending on how well you know the person, you could use "Your friend", "See ya" or "From".Sign or write your name under the sign-off.If you have forgotten to include something in your letter or you want to add an extra message, you can use a postscript (PS). This is written underneath your name at the bottom of the letter.