Online dating sites are for nice, smart, good-looking, normal midlifers - not just losers or psychopaths. Today even psychologists recommend looking for love on the web. "It's very much mainstream now, even though some people react to my suggestion as if, 'What do you think, I'm desperate or something?'" says Nashua, N.H., psychologist Carl Hindy, co-author of If This Is Love, Why Do I Feel So Insecure? "I think it's a sensible and efficient way to go about looking for a good match." The sites increase the odds of a love connection. "There are so many people, and if you set your criteria properly, both in the software and in your head, there's the potential for finding a much better match than on the chance interactions that happen in your everyday life," says Hindy. "If you were looking for a manager for your office, you wouldn't just go to a bar and see who talked to you." People look at dozens of job applicants before they hire one and dozens of houses before they buy one. Why just date three? "If you're looking for someone to share your life, why would you do less?" says Hindy. "Like the other important decisions in your life, you look through many alternatives." Some advice for using online dating sites successfully: