Well, I think a lot of these things are more about personal style and individual taste. Like there is no definitive way to dress or even makeup style. It tends to differ person to person. For me, I've learned makeup tips from friends and have checked out online resources. However, I find a lot of what helped me was just messing around finding what works for me and even that is still a work in progress. As for clothing, it's the same thing. What looks great on one girl may look horrible on you. It's more of a learning game than anything.
I'm sorry this wasn't all too helpful, is there something more specific that you are looking for?