Watch the Electric Groove Rhythm online guitar lesson by Jeff Scheetz from Blues-Rock: Secret Sauce

Remember to "hear" the solo in your head even when you're just jamming on the rhythm. This way you start to develop the ability to hear both parts, which will really come in handy and help your playing mature.
You can play this tune with a heavy tone or change it up and make it more of a slightly dirty blues sound - it works both ways!