In short, get a US based, preferably New Hampshire based, company to sponsor your green card so you can come and work for them. This obviously requires you having something of great enough value to offer a particular company to be considered for such a benefit. What would that be I can't tell, because it would probably vary from depending on field of expertise, but probably the good question to ask yourself is the same question people should probably ask themselves when trying to find a job or open their own business: What do I have to offer?