Online All the Time
In a business like real estate, you are well aware by now that your customers will attempt to contact you at all kinds of crazy hours. Make yourself readily available by using your website to communicate with clients and prospects 24/7.
Have a form on your website where site visitors can ask questions. Make sure you set up an auto responder that will tell the person who filled out the form when you will be getting back to them.
You should also post a question and answer page with typical questions about searching for homes on line, your neighborhoods and more.
You may also want to put an alternate phone number where prospects can reach you when you're out of the office.