Bring them coffee
I found that giving the Dcom bribes worked well. I'm mainly kidding about that. Just know your Book of Discipline but also be prepared to talk about places where you're struggled or had questions. Don't be too honest...if you say too much you might dig yourself into a hole. Also, there are no absolutely right answers. My Dcom also kept telling me how important it is to give them a piece of yourself. For instance, if you have a sense of humor, don't come in all stone faced and old school Methodist. Finally, trust that God didn't bring you to your Certification meeting with the intention of abandoning you there. You'll do fine.