Here is another very basic guide into GitHub usage.
After you have used GitHub for a while, you will have a desire to spread that usage over all your machines.
You would like to clone from GitHub from your notebook, from your machine at work…
To get this, you have two options:
Create an SSH key on each of those machines, and add then to your GitHub account.
Or you can replicate your single current SSH key on all of those machines.
To achieve that, all you need to do (In Windows), is to copy these files / folder from your original GitHub access machine home path to the others.
C:\Documents and Settings\Ricardo>
That is it.
I would like to ask you all from Linux and OS/X, to comment here how to do the same on these environments.