In a lot of ways, an EVP is like home improvement: you start watching enough HGTV shows from your couch and you start to think, "how card could that be? Maybe I should tackle my own EVP project..." Which are some of my favorite famous last words. Now, I'm not saying you can't build your own EVP all by yourself, but watching the process from the outside misses the complex and messy things that go on during the commercial breaks where everyone's screaming at each other and that suddenly load-bearing wall has been demoed. Oops. So if you're thinking about taking the job yourself, here is a great article at ERE on some common ways that companies who try to to DIY their EVP get into trouble.