This, IMHO, is the best advice. I remember the Dalai Lama's advice about finding happiness. How do I find happiness? "Stop lookin, be happy", he said.
Same with dating. How do I find a date? Stop looking. More exactly, live life, and in time, you'll meet someone.
Part of the reason why is that someone sort of on the hunt isn't that attractive, because such a person isn't being totally natural, or themselves. The dating game becomes false. That is subtly there to see, and is a turn off. If not then what you get is potentially two false people under pressure to maintain something.
Yeah, I know, it can't work for all, circumstances, time, and all that. But so far, regardless of who I have passed this notion on to, regardless of their situation, in time, its worked. And worked solidly.
Unfortunately, this is something people do get fretful about, and then decide something has to be done.