Here’s some links if you’re just starting out; Blender Tutorials / 47 Amazing Blender Tutorials / BlenderNation / Blender Artists
To enable the add-on go to File > User Preferences and select the Addons tab.
Click on import-Export in the left menu and then choose Import images as planes.
Put a check in the box in the top right next to the funny man.
Close the User Preferences Window.
Then choose File > Import > Images as Planes
If you are importing several images then put a check in All in directory.
Change the extension drop-down if necessary.
Then, for images like mine with a transparent background put checks in Shadeless, Use alpha and Premultiply.
Put one more check in Use image dimensions if you want to keep them the same size.