Microsoft released a 'Getting Started' guide for the Surface with Windows 8 Pro and RT buyers. The guide covers all the features of the tablet, and provides tips to set up the device, networking and other services.
The guide is very useful if you have already bought a Surface tablet or if you are planning to buy one.
Here's the screenshot of the first page of the guide as an example of the content. There are total 63 pages with hundreds of tips and screenshots.