There is a new service available that will post your Craig's List ad for you on a daily basis. Go to zinglister to find out more. If you have trouble remembering to post your ad daily this service is for you.
Many of my clients have had good success with Craig's List. Make sure that you select your area before posting. The website also allows you to upload pictures. If you are looking for a more professional template for your ad I recommed postlets.