The most recent one I can think of that I've used is random sampling. When I started thinking of potential customers I found a list of n potential users. I cou

The most recent one I can think of that I've used is random sampling. When I started thinking of potential customers I found a list of n potential users. I could have started by reaching out from #1 then worked down. But this would not have been representative of my potential user base. So I picked a random number from 1 to n and reached out to that customer. Then picked another random number, and so on. This ended up being more representative of my potential market.