Give this site a look if you make a point of using Google Calendar to handle your appointments. Appointlet allows you to have your calendar integrated right with your website. In practice, this means that clients will be able to make appointments straight from your site, and that these will be imported into your Google Calendar the moment they’re made. You won’t have to copy and paste anything, all the information that your customers submit is going to be added to your calendar for you.
In this way, you’ll be able to schedule your clients much faster, and focus on more demanding things. And a service like this one is also great in the sense it will keep you from making double-bookings. Availability is checked instantly, and by letting you do without the cutting and pasting of data the chances of putting two different people in the same slot just aren’t there.
Appointlet is a paid service, but you can give it a try for free by signing in with your Google account. Click on this link to get started. If you find that you like it, you can begin using the service to the full by paying $9 per month.
Appointlet.com In Their Own Words
Using Google Calendar for Your Appointments? Appointlet allows your clients to create appointments directly from your website, then adds them to your Google Calendar. Save time and money by scheduling your clients faster.
Some Questions About Appointlet.com
What else does the $9 monthly fee give you? 
