ANGELIC BACK LIGHT
When most people think of angels there are two things that come with it, glowing gorgeous light and that falsetto singing sound. I won't lie, it's pretty damn hard to capture the sound in a photo but the light is doable. For these types of shots where you want that glowing light to envelop your subject, back light from a window is you're new best bud. I won't go super in depth with this one because its one of the more simple types of light to work with. Put your subject in between the window and you, expose for the skin, shoot away. The images will most likely come out pretty hazy and washed out right out of camera but you can always bring back the contrast in post using the contrast or blacks slider, and/or the tone curve.
5D III + 50L
I love this frame because you can literally see the light wrapping around her. You can follow the light coming in from the open window behind her and wrapping around the sides of her face as it fades into the front of her which is in shadow. In addition to giving that soft glowing feel, it also slims her down because the sides of her face fade more into the background.
5D III + 50L
I lit this image with the window just to his upper left which gave him a directional back light. Back light is killer for helping your subject pop out of the background because when you expose for their skin (which is in shadow) it tends to make the background brighter than they are. That separation between the bright background and darker subject (in comparison) helps them stand out in the frame!