When I was searching for my maternal family, I went by the saying, “There’s always something left to do!” Every time I thought I had exhausted all avenues and there was literally nothing left to do, I was wrong. There was always another stone left unturned and if I thought long and hard enough, I would discover it. I’ve taken to using this as my motto for the paternal search as well. For any adoptee who is searching and feeling like you've come to the end -- you haven't. I promise.
With my maternal search, "something left to do" was limited to the search itself. With my paternal search, DNA testing has changed things.