I can still remember, from my exhibit designer days, the specific way I was taught to fold blueprints so that the title block was always in the lower right corner. This made it easier for the head designer or whomever to flip through the stack to locate the page they were looking for.
While there's no substitute for marking up a huge sheet of paper with your counterparts, no one can argue that having all of your blueprints tucked into a single iPad is a lot easier to tote around and access. The PlanGrid app lets you store blueprints and easily sort and annotate them, with new changes made by offsite colleagues automatically pushed to your device. The free version lets you store 50 sheets, with additional options for $20- and $50-a-month plans for 550 and 5,000 sheets, respectively. Check it out: