Are you asking about a FormsCentral form or is this a general PDF form unrelated to FormsCentral question? I can give you some guidance either way.
Using FormsCentral online forms you would send a URL where users would fill out and submit the form, when setting up your form in FormsCentral you can set up Email Notifications so that you recieve an email which can include the form data when anyone submits the form. The data is also all collected on the FormsCentral servers and available to view, analyze and share from in your account anytime. If you are looking at a FormsCentral solution I can provide more details and here is a good resource for information on FormsCentral: https://www.acrobat.com/formscentral/en/library/how-to-make-create-survey-or-form.html
Using a PDF form and Adobe Acrobat you can set up a Submit button in a form so that the form data is sent back to you via email when the Submit button is clicked, you can find more detailed help on setting this up as well as recommendations for adding a link to your form to a website in the Acrobat forums: http://forums.adobe.com/community/acrobat