subbie writes:
Fourth, get and use a spell checker.
I don't mind if someone misspells a word occasionally, but I have seen misspelled words followed by the interjection "if that is how you spell it". That it pure laziness, it shows that the writer suspects he or she has misspelled a word, but can't be bothered to check it. I have little or no patience for such people, because it reveals a sloppy attitude that usually extends past mere spell checking (fact checking, anyone?).
"Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science." - Charles Darwin.