How to make your voice feminine. No head voice. No falsetto.

Read this first: http://lena.kiev.ua/voice/
Followup video:    • Female Voice 2.0 (No Head Voice)  

EDIT: If you're having a hard time keeping your voice 'in the right spot', try looking at this link: http://shevoice.blogspot.co.uk/2009/0... and specifically this part where it says: "In order to train yourself to start breathing using the muscles around the chin and throat area, you will have to put tension on these muscles . You do this by tightening your neck muscles as if you are sucking on a sour lemon, and then try to breathe/speak." It seems like this is the best way to get your adam's apple (after raising it) to move backward into the sweet spot easily and consistently.

Also try pulling your soft palate up and back and sucking on it with the back of your tongue in order to pull your adam's apple up and backward. This might help especially if you are having trouble breathing. If you get your hard palate high enough, there should be enough room in your throat for air to squeak by. (Which I think is where the shallow breathing comes from). Having good posture will also help keep everything in the right spot.

Introduction/crash course to making your voice sound feminine.
This is what I explain to everyone who asks me "How do I sound like a girl?" In my experience, the vast majority of youtube and reddit tutorials for voice training focus on raising the pitch of your voice and then trying to compensate for the lack of chest/throat resonance with nose resonance and breathiness. The problem is that your voice ends up sounding unnaturally strained, restricted to a small portion of your range of pitches, and unable to project or yell well.
I don't know how well known this link is but the people who I've met with convincingly female voices use this technique: http://lena.kiev.ua/voice/ (Voice feminization for MtF transsexuals. Why resonance/timbre is more important than pitch and how to change it.)
In male puberty, both the vocal folds AND the vocal tract elongate, giving you a deeper range of pitches and a larger resonating chamber for your voice. Most people tend to focus on the pitch of their voice but I think that the pitch of your voice is actually irrelevant to how the human ear genders your voice. There is so much overlap between male and female vocal ranges that people don't mind females with deeper voices or males with higher pitched voices.
The human ear is really good at compensating for the changes in resonance that are related to changes in pitch. I think what works much better is changing the resonance of your vocal tract by manipulating its size (length) in order to make a more feminine sounding voice. This essentially undoes much of what male puberty changes in your voice, giving you a close-to-feminine sounding voice with a slightly lower vocal range.
The link I gave you explains the ONE MOST IMPORTANT change you can do to your vocal tract to change the resonance/timber of your voice. It doesn't have anything to do with your vocal folds. In fact, I recommend trying to keep the pitch of your voice monotone and unchanging while you attempt to raise and pull in your adam's apple.

12:44 Example of technique.

Video script here: http://pastebin.com/WLXiD8NS