My girlfriend's cousin asked me if I would take a few pictures of them for their christmas card this year. I don't do portraits often, but I feel very confident I can still give them a very nice shot to use. I'll likely be doing it outdoors, mid afternoon, hopefully it won't be too sunny out. And I'll use a SB600 as a fill flash. Anything special I should know? or does anyone have any tips? Also, what are some good christmas card poses, all I have in my head are engagement photos... They are young, like 24-25 btw.