Watch the Strums - Beats online guitar lesson by Rich Maloof from Acoustic Guitar For Beginners
Rhythm is the beating heart of music, and playing a steady rhythm is what keeps your music alive. To start playing strums in good rhythm, get in the habit of tapping along to a beat when you're listening to music. (If it's tricky to find the beat, concentrate first on what the drummer is playing.) But instead of tapping on your desk or slapping your leg, pick up your guitar and strum the strings. Lay back casually into the feel of the rhythm you hear and let your elbow swing like a pendulum as you strum. Don't worry about the left hand for now - just lay it across the fretboard to mute the strings.