Running a local business in your home town is similar to running a business through the internet. Keeping your employees well dressed, dependent upon your type of business, and with a professional attitude is essential. This works because first impressions are extremely important.
The same case applies with your website. If you have a website that looks like it was thrown together in a few hours, you are literally shouting at your visitors that you are an unprofessional and care not for the quality of your decor.
With that in mind the opposite is also true. Having a professional website layout with good color theory, navigation, and image optimization leaves the end user with the feeling you care.
Make sure you also have a uniform identity with your entire business image in mind. From promotional brochures to your business card, keep your identity solid and professional.