Before you convert an Excel, Word or PowerPoint 2007 file to an older Office version, it's a good idea to check the compatibility of your spreadsheet/document/presentation with the older version. The compatibility checker will list the unsupported features in your file and assist you in making it more readable.
Have you ever typed the word to when you meant too? Or their when you meant they're? Right, and it should be write? Word 2007 can not only check for the correct spelling of a word but also that it's used in the correct context.