With lots of patience, a thick skin, and trying to be as polite and kind as you can. Because you are in for a long endurance test at best. Or you can blow off anything I've said because I've been on a paid site for a year and have only met 4 women in person, which I'm told is actually pretty normal for average guys. Also know that there appears to be a lot of lying by both genders on dating sites, so you have to expect a lot of cynicism from women towards you based on the behavior of other men and at the same time be skeptical yourself, until you learn more about a woman, about what most women say in their profiles.

My comments above are more about paid dating sites like Match.com Were you talking about this site instead? I just noticed that you live in the UK, so your situation may be quite different. You might want to clarify more what site you're talking about. On this site, I do believe people are more likely to be honest and not play games than on most paid sites.