@Max58: You're welcome ;-)
You can actually find some great tips on workflows from the eBook "Creating Flow with OmniFocus." It's well worth every penny. The author, Dr. Kourosh Dini, has a few workflows provides several different workflows that helps you figure out OmniFocus. Then modify the workflow to fit your workflow.
http://usingomnifocus.com/
(just a satisfied customer, not affiliated in any way to Dr. Kourosh Dini)
Mastering perspectives and the "On Hold" and "Active" status is very helpful. This is what I use for my Someday/Maybe projects and my current projects on deck.
Here is a set of links showing examples of OmniFocus at work:
http://usingomnifocus.com/resources/
I would set projects to "On Hold" and place it in a Someday/Maybe folder. Every week during my weekly review, I have the choice of putting existing projects back to "On Hold" and drag it to my Someday/Maybe folder or keep it active.
Then I would look at my Someday/Maybe folder and decide which "On Hold" projects I will start working on for the next week. I usually have anywhere from three to six projects in any given week. I never try to have more than six active projects on deck. I change the project status from "On Hold" to "Active."
My mind will go numb if I have one hundred possible tasks available to me. So using "Active" and "On Hold" is necessary for me to focus my energies towards the Big Rocks I want to finish.