For those who mistakenly spell "exercise" as "excercize", here are a few helpful suggestions. First, remember that the correct spelling contains only one "c". Second, it might be useful to pronounce the word with emphasis on the second syllable, "er-ci-size", to reinforce the correct spelling in your mind. Lastly, if in doubt, consulting a dictionary or using spell-check can be reliable ways to avoid this common misspelling.