• Manage your inventory on a DAILY basis by using our inventory loading tools to make regular additions and deletions.
• If you have more than 50,000 listings, we recommend that you use the Purge and Replace feature no more than once a week.
• Use the Modify/Delete upload method to make quick changes.
• Use the Add/Modify/Delete upload method to add new inventory.
• For smoother uploads, break large Inventory Loader files into small batches. (Your Inventory Source Product File Download Account does this for you.)
  
• To avoid making frequent Purge and Replace uploads, you should reconcile your current Amazon inventory against your actual on-hand inventory.
• After your file finishes processing, review the error log.
• If you need to quickly remove all of your listings, upload a Purge and Replace file that has all the necessary Inventory Loader column headers, but no listings.
• Review the file formatting requirements prior to uploading on our site.
• Always use unique SKUs that relate only to one particular product; don't reuse the same SKU for a different product

That is right!  These are the tips recommended directly on the Amazon website for using this service.  Your Inventory Source Account directly applies to 5 of the 10 tips for success.  The remaining tips are for removing products or making quick changes, but with the detailed product data from your Inventory Source Account we can help you to eleminate the need to remove products one at a time or in bulk.  If you do need to delete large amounts of products a Custom File can be created for your needs.  "Sell More, and Work Less!"