By not expecting it and keep everyone as a possibility.
One day after two months of being single, I took my car to the shop. The mechanic working on my car gave me his number and we started a relationship a month later. Two years later and we are still dating and in a strong relationship. We still surprise each other, enjoy the same foods, love the same movies (though he refuses to watch a few girly movies like Titanic or Sense and Sensability).
When I shut up because I think he isn't listening, he gets concerned about why I'm not blabbing about my boring day. When he want's to be, he can be a philosopher and he is even better at reading people than me, the psychology major (which makes me doubt the profession I seek). We both have our ups and downs (his tendency to annoy people and my tendency to be too independent), but we get though it and it has turned out very well from two people meeting on the street.