Here is a youtube video posted by, about importing your data in the right order: If you are importing multiple objects that have dependencies, such as accounts and opportunities this video walks you through, step by step, which objects should be imported, and when.


Another great resource is the Answers forum The Salesforce community, myself included, will help users that are struggling with Salesforce problems. Log in and post a question, or search through previous answers. It is all run by volunteers, so be nice, and you may be surprised how much help is offered!