Tips & Tricks
Using various poses that emphasize feminine features and hide masculine ones is important as well but is a topic for another time.
Lighting can make a big difference. I find it best when it hits the face from directly in front. I turn the ceiling light fixture off, place a bright lamp behind the camera and make sure I use the flash. This also limits red-eye. Light that strikes from above accentuates the structure and ridges of the face and body that define the differences between male and female. Indoors, some of that can be compensated for with makeup, at least for the purpose of taking pictures, but direct sunlight is unforgiving.
When outside I make sure I am standing in the shade or at least face away from the sun. When the camera is set right so that the brightness is targeted on the face, having the subject backlit by the sun can be quite pretty; especially when the backlight creates a highlight or halo around the edges of the subject.
Changes in lighting can make a huge difference.
I point the camera toward a part of the room that will not create a distraction in the background. I make sure there are no bright lights or windows behind me that will act as a backlight and create a very dark shadow over me. I use the mirror to try different poses for each of the clicks of the camera.