Play the field, once you have signed up for a service. The wonderful part about these services is that they set up email and chat accounts through their sites, so you don't have to use your personal ones. This gives you the freedom to talk with and meet a wide variety of other daters. Spend time looking at all your options, because these sites exist to provide you with them.
Make plans to meet wisely. While the majority of online daters have good intentions, you need to take precautions while planning to meet a person who is essentially a stranger. Pick a dating location that is safe and public, and never at someone's home. Always provide your own transportation to meet the other dater.
Organize your own travel and accommodations for long distance dates. Many people find a compatible mate online but must fly or drive a great distance to meet. Never stay at the person's home or allow them to purchase your travel accommodations.
Feel comfortable breaking off the relationship. Whether you have only chatted a few times online or gone on several dates, if you do not feel this is the right connection for you, do not hesitate to break off your relationship.