Body Language

This is going to be split into two sections, firstly developing your own body language and secondly interpreting that of your target's.

Your Body Language
If you can exude confidence while being relaxed you have no need for pointers on this topic, however there are very few people that can manage this. Firstly don't take up the "Alpha Male" position, pointing your hands towards your crotch doesn't work and instantly gives you away, just act naturally! The two best ways to suggest confidence are by having your hands out of your pockets, and to have your hand held high, this gets you 90% of the way there! Slow down your body movements and keep yourself open - this makes you seem approachable and easy going!

Her Body Language
It's a myth that women are hard to interpret, the signs are there you just have to spot them. Firstly look at where their feet are pointing, if they point at you then you can tick this box. If they're being flirty then this is the easiest and most obvious sign to spot - it will be mainly extra laughing, keeping the conversation going as well as eye contact which is easy to spot and it'll be there by the bucket load. If she touches her hair and fidgets with her hands a lot this is again an easy sign to spot, and is one of the most dependable!
There are 3 key points to spot
1. Eye Contact
2. Eye-lash Fluttering
3. The Feet Point