Obviously, these are all advertiser promotions, but the free stuff pages on the Oprah Web sites are good places to check periodically for free samples and sweepstakes.
Oprah.com has a special advertising section that lists free samples and sweepstakes from Oprah.com sponsors. You will usually find the most offers on this page.
The Oprah Magazine Web site also has a list of sweepstakes and promotions from O Magazine advertisers. The Oprah Magazine list is usually just sweepstakes, but every now and then they will list a free stuff offer.
The privacy policies will vary depending on the sponsor, but you can be pretty confident that the advertisers on either of the sites are reputable companies. As always, you should only give out the information you are comfortable with and use an alternate email address if you are afraid you may get too much commercial email to your primary account.

