How do I make a single page use ssl in Drupal 7? I have a form I created with Webform, and I need it to be secure.  I don't need a login for everyone, only SSL for that one page.  Is that possible?  How do I use https:// for that one page?
Take a look at the Secure Pages module. The module enables you to:

A small process which will redirect the required pages to a SSL version of the page.

To make use of it, take into account though that your webserver / webhost will need to support SSL and it should be configured for your site.