Don’t leave a word misspelled [in your script]. With spell-check programs on most computers, it is easier to produce perfect, clean scripts. But you still have to read every word carefully. It’s a safe bet that a script will be rejected if it has half a dozen typos or other errors in the first ten pages. If you don’t care enough to make it clean, the rest of us don’t waste time reading it. The same goes for grammar. No excuses here.