From my understanding of "The Secret" by Rhonda Bryne as well as "Law of Attraction" by Michael J. Losier one of the very first things to manifestation is to find out specifically what you want. It has to be something real specific such as instead of saying "I want to lose weight", something more specific would be "I want to lose 30 pounds".
With this I've been trying to "break-down" my intentions so that they aren't broad. I've found though that manifesting solid objects that I can feel or touch is easier than manifesting a relationship or friendship with a particular person which is my current intention. I don't know if "being friends" with someone is specific enough to manifest that reality.