These are the things that I've observed over a period of time and compiled. You can add others that I've missed or correct those that may not seem correct. Ready? Good, I was hoping so!
Positive Indicators
- Smiling - shows the woman she's interesting in your conversation.
Legs open facing towards you - this is a sexual invitation and big IOI.
Knee cap pointing towards you - This could be debatable of course.
Nodding of the head - shows you that she's listening and with a smile she's agreeing with what you're saying which is interesting to her.
Neck Exposed - shows her neck which is showing you IOI.
Wrist exposed - When she's smoking if her wrist is exposed this shows she's attracted to you.
Hands on hips - This shows she's displaying sexual assertiveness. While if a mane did this it would mean he's gaining authority and dominance.
Lean forward - Shows you interest into the conversation.
Touching her skin - shows you an indicator that she wants to be touched.
Arching her back towards you - Indicates sexual interest.
Open body language - shows you that she's open to your approach and interest.
Dreamy Eyes - Shows you that she's attracted to you and likes what she says.
Playing with her hair - Indicates a type of grooming behavior which also could mean she's anxious\worried or interest. This could be debatable of course.
Tilted head - indicates she's interested and if she has a smile it's good.
Feet Pointed towards you - indicates she's into you and she's listening to what you're saying.
Flush cheek - Usually from being embarrassed or just blushing that you said something cute is a big IOI with a head down.
Putting her finger to her lips - could indicate that she's thinking about something or wants to tell you something but not going to.
Head Down - showing you she's serverant in a domant male's present which in some cultures attractive to men.
Feet Pointed - Always look at the feet because subconsciously they telegraph where she wants to go. So if she's pointing one foot to the bed while looking at something crossing her arms. This indicates she rather be on the bed instead of looking at your DVD collection! 
Negative Indicators
- Arms crossed - indicates she feels defensive about what you are saying or disagreeing what you're saying.
Looking down - indicates a disapproving and disinterest in what you're saying.
Looking Away - Also indicates disinterest or distracted.
Yawning - Indicates either tired or not interested and not willing to carry on conversation.
Finger put to the mouth - Indicates she wants to say something but isn't going to or doesn't feel comfortable about saying something.
Rubbing of the brow - Indicates nervous and anxious behavior. She feels nervous about something you told her or are telling her.
Scratches hair - May indicates fleas! LOL! No, indicates a nervous behavior due to lying.
Frown - Well, of course we all know what this means so no further need to explain.
A consealed smile - Indicates something they might have in the back of thier minds - or something they're not telling you. Not very trusting. Usually, a behavior to telegraph Superior and Cockyness.
Bitting of the lip - Indicates nervousness and anxiousness. Ususally when the person looks down this is a good indicator of not telling you something you should know about.
Closed Legs - Yup, you guess it! Not sexually interested nor interested when the legs are pointed away from you.
Arms in coat pockets - Indicate boredom and disinterest. Also, women's hands are sensitive so it could be they're cold. But also bored is most likely the one.
Nose Up High - Indicates superior and a negative attitude during the conversation. If you're talking about intellectual and she puts her head up high it may indicate she thinks she better than you.
Shaking of the head - You know what this means! A disapproving gester.
Shrugging of Shoulders - Indicated doesn't know or don't care attitude.
Also be sure to look at the whole body to read an accurent reading. It's said to not look at ONE but look at everything. So for example if she's shrugs her shoulder and purches her lips while shaking her head telling you, "Sure that'll be great!" this could mean something she's not telling you what's on her mind. So if we break it down. Shrugging the shoulders mean - she doesn't care. Purching of the lips means - She's thinking or completive. And shaking the head means she's disagreeing with you on some level. So if a girl shows this make sure she feels comfortable and this will allow you to have less flakes on your hands.
What are some of the body languages have you noticed in women and on dates? I'm going to be starting to read a book about Secrets of Body Language: Dating and Relationships.
Let me know!

Peace!
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