Data Import: Prepare your Data for Import | Salesforce

This short video walks you through how to clean up your import files in prepartion for getting your data into Salesforce. We'll walk you through both the how and the why of clean up, and how you can catch duplicates and match the data to the correct owner. And we provide information on how to keep your data clean, once its in Salesforce.
links:
Data Import playlist
sforce.co/dataimport
Help Topics
Data validation rules:
https://help.salesforce.com/apex/HTViewHelpDoc?id=fields_useful_field_validation_formulas.htm&language=en_US
Picklists:
https://help.salesforce.com/HTViewHelpDoc?id=updating_picklists.htm&language=en_US
Lookup fields:
https://help.salesforce.com/HTViewHelpDoc?id=search_lookupdialog.htm&language=en_US
Workflow field updates:
https://help.salesforce.com/HTViewHelpDoc?id=workflow_defining_field_updates.htm&language=en_US
Formula fields:
https://help.salesforce.com/apex/HTViewHelpDoc?id=useful_advanced_formulas.htm&language=en_US
Record types:
https://na1.salesforce.com/help/doc/en/salesforce_pagelayouts_cheatsheet.pdf
page layouts:
https://help.salesforce.com/HTViewHelpDoc?id=customize_recordtype.htm&language=en_US