I honestly don't know. Most of the friends I have made over the years have come from two things; being in the same situation as them (school, work, etc) for a significant period of time, and sharing some of the same interests with them (in my case, mainly video games and "nerd" culture).
Now, as far as talking to NTs *in general*, try giving them some eye contact, and give them a bit of "breathing room" as well (6ft of distance between yourself and them is good in most situations). Don't be afraid to act like yourself, but just keep in mind that most NTs find it uncomfortable to talk to people who are right in front of them (which is sort of paradoxical considering how much they seem to enjoy poking and prodding one another
), and many NTs have a hard time listening to people who aren't looking in the general direction of their faces, as far as I can tell.