24. How can I delete duplicate items easily?

After a synchronization with an handheld you may have duplicates in your Outlook.
With NoMoredupes for Outlook you delete your Outlook doublets in seconds.

25. How can I recover deleted items from Outlook?

For Outlook users without Exchang it is a little bit complicated to recover your deleted items:
http://www.outlook-tips.net/howto/recover_deleted.htm
If you use Exchange: If you have emptied the Delete Items folder click Tools > Recover Deleted Items.

26. When I try to delete an item nothing happens.

Empty some email from the Deleted file and try again.