In this article I will describe how to install ClockworkMod Recovery and CyanogenMod on the Samsung Galaxy S3. By installing CyanogenMod your device will also be rooted. I have written this post while I was installing ClockworkMod Recovery and CyanogenMod on my own Samsung Galaxy S3 GT-i9300 (International). I provided the specific software download locations for the GT-i9300 and also the general download links in case you have an other model of the S3. You may also consider taking a look at the tutorial from the CyanogenMod website for your specific device. Also make sure that you have enough battery life throughout the whole installation procedure and to read the disclaimer before starting to follow this guide!