Tutorial website Tech-Recipes has posted a handy guide for non-Outlook-ninjas to delete duplicate contact entries created by device syncing, importing, or other situations. The main tip involves getting Outlook (seemingly Outlook 2007, but perhaps other versions as well) to sort your contacts by creation date, which is not quite as easy as it would seem. While not quite a simple hack, it's definitely a time-saver compared with individually deleting contacts one by one. How do you prevent Outlook (or any email app/organiser) from creating duplicate entries? Share your tips in the comments.