Once you've created the form, you can e-mail it to any address you like, or use your Google contacts list. This provides a link for each person to access the form and fill out the appropriate information. You can even include the form directly in the e-mail improving the chances people will respond.
Once they've filled out the form, you have a couple ways to view the information. If you open the form window, you have the option to click on View Responses and see the assorted data. You can also view the information in spreadsheet form from the Google Docs window if that provides the data in a better format. One really nice trick is if you have the spreadsheet window open, you can view the responses live as people fill out the forms.
The Google Forms option adds a lot of useful functionality, but we haven't even covered everything. Some other options to explore include embedding the form on your own web page, changing the Thank you message, enabling and disabling forms, and so on. Also the data is a full Google Spreadsheet document so you can use all the features there as well.