The most simple tutorial ever
I am often asked how a new user can get started the fastest.
The first place I send people to who are new to Unity is the Learn section of the Unity Website. Here the new user can find links to the video tutorials, live training, documentation and the community.
If, however, this is not fast enough for you, you can try the following tutorial. This will walk you through the most basic steps needed to make a working scene in Unity and uses many of the most basic elements found in a Unity project.