If you are more of a visual person and would like to organize your folders and files using different colors, than check it out how to use color labels in Mac OS X.
By default Windows calculator doesn't support order of operation, to enable the functionality you need to activate the scientific view, let me show you how.
Mail merge is one of the most useful features of Microsoft Word when wanting to send personalized letters, documents or e-mails to people you have stored in an Excel sheet. Let me show you how to use it.