Write to me frequently & the longest letters possible; never mind whether you have facts or no to communicate; fill your paper with the breathings of your heart.
Try and write straight English; never using slang except in dialogue and then only when unavoidable. Because all slang goes sour in a short time. I only use swear words, for example, that have lasted at least a thousand years for fear of getting stuff that will be simply timely and then go sour.
I cannot write in English, because of the treacherous spelling. When I am reading, I only hear it and am unable to remember what the written word looks like.
For a true writer each book should be a new beginning where he tries again for something that is beyond attainment. He should always try for something that has never been done or that others have tried and failed. Then sometimes, with great luck, he will succeed.