Watch the Straight vs Shuffle online guitar lesson by Brad Carlton from Guitar Lab: Boogie-Woogie
This lesson deals exclusively with the two rhythmic feels: straight eighths and shuffle (or swing) eighths. I'll show you how to count these rhythms so you'll be rock solid. As I always say, "If you can count it and sing it, you'll know what it's supposed to sound like and you'll know how to play it correctly". If you've been reticent about counting, don't skip this lesson. You will learn specific verbal counts to distinguish straight eighths and shuffle eighths. Understanding rhythm is not difficult, you just have to count.