Depends on what you mean reliable. In terms of reliably getting you on a date, you should consider what kind of things are important to you in a person. Your showstoppers. Religion and lifestyle are usually key showstoppers. That may determine whether or not you consider a niche. Assuming a large generic is of interest, I’d recommend using Match, eHarmony and POF. You can’t go wrong with those really. Now in terms of the way you use them effectively…that’s a whole new conversation. Load some current photos on Hotornot and see which scores the best, and use your best ones on your profile. Be specific in your profile…not wishy washy. Don’t talk about ex’es and keep it positive, and that should improve your chances.