It depends on your niche. If you are wanting to just make a random "fun" page, then just add people randomly and invite them to your page.
If you are targeted a niche, you can do it all by hand - You will get good results. But this is still slow. So you could visit fanpages/groups that are specific to your niche (i.e a fitness group, "get muscle quick" group, blah blah) Of course avoiding the fake pages, or ones with FBML (3 step) and then scrape the ID's of the users and add them as friends.
Then there is geo-targeting which you could do by hand