The Canon 6D is a favorite of mine which often comes along with me to shoots. It has loads of features like built in WiFi, which is ridiculously awesome. The camera offers excellent high ISO performance and out performs every other camera with locking focus in low light conditions.
If you already own this camera and want the fastest most effective way to learn how to use it, I suggest my training tutorial video made specifically for the 6D.
Canon 6D Crash Course Tutorial Video