Success in online dating will be most likely be influenced by a number of factors and one of them would be how well you carry out online chats. The instant messaging feature of online dating sites are created to provide a platform where you can talk to each other, providing the opportunity to gauge if you are the perfect match. If you do well in chatting, you will have a strong chance of being able to meet each other. On the other hand, if you are lame and rude, do not even expect a response from your message. 
One of the best topics that you should tackle when chatting would be personal interest. Where do you like to hang out? What are your favorite travel destinations? What do you do during your free time? Are you into sports? What is the television shows that you watch? What are your political views and religious beliefs? From light to serious topics, your personal interests will be an excellent way to measure your compatibility. If you are interested in the same things, there is a strong chance that you will click. On the other hand, if you are from two completely different worlds, you might just be wasting your time.
You can also talk about your career and professional life. No, this does not mean divulging where exactly do you work or how much you get paid for your job. You can talk about the nature of your profession in general. Your jobs will let you know more about the aspirations of each other, which is important if you are looking for serious relationships. On the other hand, if you just like to have casual sex, this will not matter a lot. Nonetheless, this can still give you a good conversation once you run out of topics to talk about.
Should you talk about sex? This is one of the most common dilemmas when it comes to online chats. Well, even if you met each other on a website that is created specifically for strangers looking for casual sex, to be safe, be decent in your first exchange of messages. Once you have spent time chatting, use your gut feeling to tell if you can already talk about sex. For guys, to avoid being labeled as rude, wait for her to insinuate talking about sex. To be sure, you can also be frank to ask her if she is open to talking about intimate topics.
Regardless of what you talk about, the most important thing is to stay positive. By being positive, this could mean avoiding arguments. For instance, if you support different political parties or if you have different religious beliefs, the best thing that you can do is to just respect what each other has to say. If you spend time arguing, there will come a point wherein one of you will just give up and will never bother talking again. If you have hopes of meeting each other in person, make sure your chat exude only positive vibes.