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Google Reader is a popular service for those following lots of RSS news feeds and this is the best way to work with the service on Windows 8. Nextgen Reader has a no nonsense interface that is designed to present lots of RSS items for easy interaction.
All Google Reader functions are supported and the app has full two-way synchronization to keep the cloud info updated. This is my favorite app on Windows 8.
The Windows 8 file manager is the old standby for working with files but it's not as touch friendly as you'd expect on a tablet. Metro Commander steps in and adds a dual-pane interface that makes copying/moving files around as simple as dragging and dropping them.
OneNote (Metro app)
OneNote users should pick up the app in the Windows Store for good touch handling of your OneNote notebooks. It is particularly good for inking should your tablet have a pen.
Note there are two different OneNote apps on Windows 8. This app is a full Metro (or ModernUI) app and there is another that is part of Office 2013 that is a desktop app. You can have both versions installed on the same system and use them as desired.