RacingThoughts wrote in post #11131908
The is my $0.02...
70-200 would be my choice for most of the session. Maybe take a few full body, environmental shots with the 17-55. I usually choose the closest eye, but keep in mind how much depth of field you are working with.
Position her so that the sun is coming from 30-45 degrees from your left or right and behind you. Turn her body turned slightly away from the sun (not square with the camera) and her face looking in between you and the sun so that her face has more shadow than light.
Do some reading on posing, lighting, etc. You'll find other tips like keeping her arms away from her body, having her shift her weight to her back foot, etc.
None of this is set in stone, just general guidelines. Hope it goes well.

I have a general sense of portrait work from looking at about 20+ pages of threads in the people section, but, like they say, you'll never know until you actually try it. I had that rude awakening when I shot my first football game, under the lights 
Anyways, this girl is a freshman in college (I'm a senior in high school), she is very photogenic, and I believe she has had her senior pictures done so I'm hoping she'll have some experience with posing and what not to make it a little easier on myself, haha. She also offered to be my "crash test dummy" so she will be a great help to get practice
gonzogolf wrote in post #11131957
Like racing thoughts said, focus on the eyes. For natural light you have to make sure that some light is falling on her face. Flare is nice, but if you position the sun behind her he face is likely to be one of the darker parts of the scene. Do you have a flash, or an assistant who can help hold a reflector? Try shooting some in flat light if you can. Open shade is best.
I do have a 430EXII with a shoot-through/reflective umbrella but I really love the look of a well done natural lit portrait, so that's what I'm going to be focusing on. This isn't a paid shoot since she is a friend of mine. We're going out so I can practice and, well, she's calling it a date. So, I'm not going to have anyone with us. I don't have any reflectors of any kind either so assistants wouldn't be of great help.
Off to do some more researching, thanks for the help guys, keep it coming!