Project Based Learning

So, I'm taking a 3 day course in Project Based Learning with Charity, from the Buck Institute for Education.  So far it is . . . overwhelming.  It seems great, but I have a lot to learn and plan.  It's going to turn my concept of teaching upside down. . . but that's not a bad thing.  It's just something I need to wrap my head around. So far I've learned that the projects are not the culmination of the learning, but the avenue for the learning itself.  That makes sense.  Now how do I come up with a project that teaches everything I need to teach?  The website has a lot of good info, including a database of projects already created by subject and grade levels.  It's what I'm beginning with, but I can already tell it doesn't have nearly what I want.  I need to learn how to get creative so I can think up the kind of projects that I need/want and will work for what I'm teaching to my particular kids AND can incorporate every requirement that I have to meet in a lesson/objective/format, etc.  I'm looking forward to day 2!