Most of my career so far has been spent designing and developing
products for speciific audiences, like the HR department at an airline
or something, so I've always had quick access to a product's target
users. Next week, however, I'll be starting a new gig where I'll be
tasked with performing IxD and usability testing for commercial
software, which is/will be used by many types of completely different
users, all of which are decentralized to such an extreme that one
person could be a potato farmer from Idaho and another could be the
head of a startup that sells mechanical pencils.
So my question to you cats is this: What steps do you take to find
people with which to perform usability tests when your audience is not
a specific group?