9. Dress proper (maybe its sounds strange but you represent main photographer brand and style so better to find out what to dress, as you doing a wedding shoot where everyone around will be dress appropriate. I even heard on one of the wedding how groom been joking about photographer that its underdressed person in the room, hope you not will be this person}, but of course clothes need be comfortable so you can lay on the ground, climb up if you need etc. Of course some weddings more casual (as rustic farm, outdoor, beach weddings), but we still need dress smart (black and grey colours always works!).
10. Be a people person - its all about positive experience for couple, not just amazing photographs, and this first point sometimes much more important then second, as its how people remember you. Talk, jock, help peoples, be reasonable and sensitive with empathy and ability to understand situation and emotions.
11. Think ahead, pre-view the moment happening (couple go back to the aisle, entering reception, bride's mum ready to cry etc.) and be ready to find the right spot to capture it without disturbing the moment. Keep your eyes open and learn from your mistake, its a big learning curve and after each wedding we analysing and looking forward what we can improve. You can always check with main shooter if he have any recommendations, but Im sure you know yourself what you can be proud of and what did you missed :)
Good luck with this exciting position! Its great to have fun on second shooting and also take your own main weddings (funny enough I started not traditional way and right jump into shooting my own wedding with right attitude and confidence, but I also did a few weddings as second shooter so know exactly how its feels). Its great to team up with other photographers and be in the great community and be ready to help each other as you never know when you may need some help. There a lot of local Facebook groups for wedding photographers, we also trying to catch up as often as we can.
Here just one of the pics what I took as second photographer shooting wedding caremony in Ataahua garden venue, Tauranga, New Zealand.