When getting ready to respond to an inquiry, really read the information that they've provided and personalize their quote by using their information. This lets them know you've taken time to read and understand what they're wanting and also shows them that you are willing to invest in them if they choose to work with you. Stay away from generic responses and standard replies and make sure you insert their own words back to them! It only takes an extra minute, but may be just the step above the rest that wins the job!
Your profile and quote are your first impression to your customers. What makes your business stand out? and What do you like most about what you do? are important. Don't just say what you think customers want to hear, be genuine and put your heart into it the same way you did when you started your business.
When sending a quote, be confident in your work. You have to make sure the customer knows that you know what you're doing and you're the best person to do it. And always make sure to thank the potential customer for their business even if they haven't hired you yet. Confidence and genuineness sells!