For a list of commonly confused homonyms, see D2 in the Quick Editing Guide. See also A Glossary of Troublemakers, in 34.
English spelling so often defies the rules that many writers wonder if, indeed, there are rules. How, then, are you to cope? You can proofread carefully and use your spell checker. You can refer to lists of commonly misspelled words and of homonyms, words that sound the same, or almost the same, but are spelled differently.
You can also use several tactics to teach yourself to be a better speller.
For more spelling information and practice, visit bedfordstmartins.com/ bedguide.