1. In the upper left corner of the first page, single space on separate lines, place your name, address, phone number, and email address. (I'm amazed at the people who don't show editors how to contact them.)
2. Across from your name, in the upper right, give an estimated word count, rounded off to the nearest 50. To write 937 words is not an estimate, but 950 is.
3. On the next line, put the rights you want to sell. This will usually be first rights. (First rights mean that after they have published it once, it's yours to resell.)
4. Once you've put in your information at the top of the page, go down about 1/3 of the page and center the title. (I usually begin at 3.8" or 4" but the exact number isn't important.) That empty space between your personal information and the title of the article is space reserved for the editor. Don't put anything in that space.
5. After you've centered your title, hit "Enter" and start typing. (You don't need to put "by. . . " because it's at the top of the page and your name is in your header on every subsequent page.
6. When you get to the end, just stop. You don't need anything like -30- or "The End." When editors see no more words, they'll assume that you've finished.
It takes little effort to look professional.
But it does take effort.