Ok I am sorry Jawadall, I cannot find the thread I mentioned earlier. I know it is here, but apparently search doesn't always work. I believe it was posted in OT about a week or so ago, but looks like it has disappeared.
The basic ideas I mentioned were as follows:
1- Don't underprice your services. Customers will take advantage of you and you waste your time.
2- Write up a formal, SPECIFIC warranty and either have it print on your receipt, or staple a copy to the receipt and give it to every customer. Don't deviate from the warranty, but make it reasonable. You might have to play with it a little to find what fits you and your customer base.
3- Make up a work order form that has spaces for your name, the date, and the customers' name at the top. List out common fixes, like virus-removal, hard drive replacement, etc... Print a bunch of copies. Then, for each customer, mark which items you did and have them initial each item. Then have them sign and date at the bottom a clause which states they were a- happy with the work and b-understand what you did.
4- Don't advertise in the yellow pages, because in my experience, it's too expensive and you don't get a lot of business for it. In the beginning, use cheap methods such as bulletin boards at stores and schools, flyers, business cards at local businesses, and possibly a small targeted direct mail campaign from a reliable direct mail company. Eventually your referral business will be your most profitable.
5- You could sponsor an ad on local radio or tv during cheaper hours, which might help you some business.
6- Make other businesses the backbone of your operation. They have more money and more needs, which means more revenue per visit versus home customers.
7- Build long-term relationships through high quality service and parts.
8- The most important is, before you do anything, research your maket. Check prices of local competitors by calling them and asking for service rates. Generally you want to do business in richer areas of your local township, but make sure the market isn't saturated with local computer stores. These stores get a lot of prestige because of their storefront, and it's hard for you to compete with them. Don't spend any money until you have a good idea whether it will work.