Good Lord, let's stop with the swetty douchiness...this is his first real "gig". Fer Chrissakes...all this hair-splitting about what the word gig means, all this talk about nothing...
1) have a plan 2) have a checklist of everything: locations, times, needed equipment, shot order 3)focus on getting the exposure and lighting RIGHT, at the location, as you are shooting. It's worth a few minutes' time to get the exposure and the fill lighting RIGHT, and only then, only then, begin posing and shooting. This is how you avoid coming back with crap! That means check the ISO, check the white balance, check the synch speed, check the histogram, and make some adjustments to get the exposure and the lighting RIGHT, before you start shooting each pose or sequences of poses. 4) On a two-person shoot, you have two people who can either, or together, manage to screw up a pose or a photo. One of the most important things is to TELL people exactly how you are going to conduct the shoot. So, as you are adjusting the lights and making test exposures, tell them that is what you are doing. Then, explain to them how the "real" shooting will be done. You will tell them how to pose or to place themselves, and then give them final directions, and you will shoot four or five, or as many as ten frames, to get each pose satisfactorily recorded as a 'keeper'. A lot of people try really,really hard; one of the best phrases to tell people is, "not every frame needs to be perfect". Describe to them the way that you will shoot multiple,small variations of each pose. Help them coordinate expressions; nothing looks worse than a big, white-toothed, full-smiling bride to be and a closed-mouth, semi-serious groom to be---you need to tell them and I mean you need to verbally tell them, exactly, how each pose is supposed to be done and what the desired expression and interaction is. This approach helps people quite a bit--just knowing that not every shot must be 'perfect', and that they will be given an opportunity to fail, to slip up, etc.
Two-person M+W shoots often involve a willing woman, and a somewhat reluctant man. If the guy will not smile fully (maybe because he has bad teeth,or is self-conscious), then do not force it, but work with what he can give you. There is also a technique where you allow the two of them to relate to one another, with you photographing their own personal interaction from a distance, using a tele or tele-zoom lens. One way to shoot this is to use a 70-200 or similar, and have them walk toward the camera, slowly, as they interact with one another, and you zoom back as they approach. Begin with the lens at 200mm. As they approach close, you'll be down to 70mm. Needless to say, since this is two, walking people, MOST of the distant shots MUST be shot as talls, or they will look like crap.
As to your plan: don't get overly ambitious. You do not need a zillion billion frames. They might be played out after one hour of shooting, so try and get FIVE to seven poses committed to the "keeper" level. One or two of those can be a short sequence. Aim for no more than 25 finished photos, at the most.