I sign up for everything. Everybody's newsletters (companies, restaurants, etc). On top of my awesome bathing suit win (a result of my ON subscription) I got into my email and had 21 emails with birthday gifts in them.
Anything from a variety of free foods to free toys (petsmart) and store discounts.
That's an awesome win! I adore free stuff and sign up for things constantly. We signed up for Sizzler's e-club and had two great steak dinners for less than $20 total.