Carefully screen the profile, get phone numbers at work and home and check the person out first to make sure they are who they say they are.

Figure out what you really want in a person: lifestyle interests, income, personality, religion, hobbies etc. Don't set too many qualifications or artificial criteria though or you could miss out on someone you really like.

Online dating is efficient. We're a fast food society and now you have a pool of eligible people to choose from.