I was browsing though Bret's site and came across his article called "The Contreras Files: Volume III"
So in this article, Bret has something interesting to say about Cluster Sets:
Cluster Training for the Deadlift
There are an infinite number of possible ways to arrange a cluster set, but here's a specific protocol that I really like. Recently I put on some really loud music, loaded up the bar to 405 pounds (around 75% of my 1RM), and pulled ten explosive singles with about 10-15 seconds of rest in between reps (as much time as it took for me to walk around the inside perimeter of the training studio).
This was an awesome training stimulus and something I'll try to do more often. To reiterate, the protocol is:
10 x 1 with 75% of 1RM with 10-15 sec. rest between sets
Remember to pull with maximal acceleration.
That is not a protocol at all. That is just one workout. How does one proceed from there?
Speaking of Clusters, I have not come across any article which is better than Eric's on It's All About Time: Ideas for Manipulating Rest Periods in Strength Training for Force Potential (not Bodybuilding)
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."
"If you tell the truth, you don't have to remember anything."
"Never put off until tomorrow what you can do the day after tomorrow."