Not for me, at least (she boasted vainly), I think because I seem to have a pretty good visual memory, but even so I usually find that I have to come back and fix one or two careless spelling errors in these postings, just because I’m not always paying attention. However, everyone agrees that English spelling is gruesome, because the language is a glorious jumble of different base languages that was “frozen” in print before reasonable (i.e., phonetic) spelling rules could be imposed. British/Canadian and American spellings differ as well. Nevertheless, English spelling can be conquered without resorting to replacing to/two/too with “2” with some care and attention to rules, exceptions and mnemonics.
These guidelines note that if you really want to improve your spelling, you’re going to have to practice, practice, practice. And note rule #9, which is more about punctuation:
Watch out for the “grocer’s apostrophe.” This gets its name from a spelling error traditionally made by greengrocers on signs in produce sections. Unfortunately, this error is popping up in all sorts of places these days. Remember that an apostrophe with an “s” shows possession. Correct: “The banana’s skin turned brown.” You do not use an apostrophe to form the regular plural of a noun. Not correct: “Special on banana’s: 49 cents.”