You can never overestimate the value of customer service and word of mouth advertising. The fact is, nothing works better than word of mouth, and friendly recommendations.
Get some business cards, tell your friends and family and coworkers, and then focus like hell on your customer service.
Remember, people who will hire you to fix their computers are not interested in how much you know about computers, past the point of being able to fix their's, which is a given. You'll win them over by being friendly, approchable, and nonjudgmental.
So many people have the opinion of IT people as cold, unpersonable people. Many IT people prove this theory correct.
You'll win your customer base by defining your market, and appealing that market's personal side.
And make sure you can fix their computers, too
