First, I hope you are a chick. If not, then get out of sales.
So, assuming you are female, then you just need to take the DM on a milk run because this is not a sales job. A real sales job would allow you to take your manager to calls where you are looking to get business, not get the manager approval.
Ok, now that we have that out of the way, I would say just to get your car in order, with lots of promos, then get your itinerary in order, so you have a good day planned, with good precall. Then, just get a good night of rest. That's it.
Don't make this into a big deal. It really isn't unless your manager is a dickhead. And if you manager is a dickhead, look for another job unless you make so much money and the rest of your job is so good that his or her dickheadedness don't matter.