The Pentatonic Scale
The Pentatonic Scale is one of the most important thing a guitarist can learn (along with open chords). The perfect routine for a new guitarist is to spend half of your time learning songs and the other half spent drilling these scales into your musical vocabulary. Here is a list describing the numerous reasons why scales need to be a part of every player’s daily practice routine.
Here are the shapes tabbed out, pay close attention to the fingerings. Here is a video showing the exact way that I suggest practicing these.
And here is the “open position”, something I would suggest practicing after you have fully memorized the five shapes above: