Raspberrypi.org provides a great deal of resources for getting started with the Raspberry Pi. There are also endless blog posts and non-official sites that are helpful. In addition to Raspberry Pi specific resources, also checkout getting started with Linux guides. One of the best things to do when learning Linux is to start with the command line. Anybody can point and click things. There are a lot of Raspberry PI builds where you won’t want to waste resources running a desktop environment.
Below are external links related to the Raspberry Pi. The sky is the limit for any application that doesn’t require heavy processing power. You can make a cool drop box for pentesting, portable wireless access point/router, media center, run emulators to play old games and ……
Raspberry Pi Specific Links
https://www.raspberrypi.org/help/noobs-setup/ – Get started with the basics at Raspberrypi.org
http://www.instructables.com/id/Raspberry-Pi-Projects/ – Raspberry PI projects on Instructables.com
http://elinux.org/RPi_VerifiedPeripherals – Great site for making sure any accessories you are about to buy are compatible with the Pi.
Kodi – Kodi (Formerly XBMC) is a media streaming software that runs on a number of different operating systems. It is great for running on a TV to access the library of music, video and pictures stored on your computer. There are Raspberry Pi distros like OpenELEC that come with Kodi already installed.