Mr. Frederic Durbin and his analog writing students tell PEOPLE about typewriting letters to Tom Hank — and his replies.

Writing letters to friends and people we know well is slightly different to writing more formal letters. However, they both follow similar rules, as Cinders helpfully points out to Joe.

Who would people expect to make this offer ... So it's often best to call in a pro. But if you face a letter-writing situation yourself, follow these 10 tips. You'll end up with a better, stronger ...