Watch the The I-IV-vi-V online guitar lesson by TrueFire from Play Acoustic Guitar 4: Rhythm Approaches
The I-IV-vi-V - Progression #13 is a video guitar lesson presented by Ravi and is sourced from Guitar Lab: 30 Rock & Pop Progressions.
In order to add even more interest, instead of returning to the I in between, we can go to its relative minor, the vi. This maintains a similar sound, but adds a slightly darker flavor.
Examples: "She Drives Me Crazy", "Hit Me With Your Best Shot", "More Than A Feeling", "I Got A Feeling", "Say"