Watch the Pentatonic Picking Exercise 1 online guitar lesson by Jeff McErlain from Beginner Blues-Rock Soloing
As promised, here's that Jimmy Page pattern that I stole off of Led Zeppelin I. This is a great pattern to get you going because it's instantly usable. It's based off of triplets, which means each beat gets three notes. The easiest way for me to remember triplets is the phrase "um-pa-pa", with each beat getting one "um-pa-pa". Think of that waltz feel as you play along with the metronome.
It's really important to always think about sitting in correctly with the metronome and always be thinking about the music. What I mean by this is that I'm always trying to have anything I play sound pleasant. Are my notes cleanly played? Are they rushed? Am I dragging? Do the notes sound warm and full? etc. So when you're practicing anything, whether it is a song or a technique, always think about creating music. Every time you pick up your instrument think about creating music.