Watch the Pentatonic Picking Exercise 2 online guitar lesson by Jeff McErlain from Beginner Blues-Rock Soloing
Let's take a look at this pentatonic pattern at 70 BPM. After this, slowly move up the metronome on your own. It's great to keep the little journal and very satisfying to see your improvement. I realize this can be a painful experience at first, but the metronome is your friend. Once you make friends with the metronome, you won't want to practice without it. The metronome doesn't lie, so it's like she's the brutally honest friend. She'll always correct you when you're wrong and reward you when you're right. It's very easy to get frustrated when using the metronome at first. Like anything in life, it's a skill that needs to be cultivated.
I also highly recommend a drum machine or drum program of some kind to practice with. These can be a heck of a lot more fun than the metronome, but it's not a substitute. There ain't no way around it. There are many metronome apps available for smart phones, or you can use the metronome
here on the TrueFire site.