There are a lot of deals on the web. Tons of printable coupons, not just for groceries but for all kinds of things from restaurants to clothing to sporting good. Many of these deals require you to provide a bunch of information to get them or at least an email address. Given an email address can be beneficial because their websites might send you even more deals (like groupon.com to name one). Some require you to like the item or company on facebook or retweet it on twitter.
But what if you don't want all your friends to know you "Like" Tums or Tampax? What if you don't want to have to sift through a ton of junk mail to get to your real mail or to read your news feed on facebook? Get a separate account. I have a separate gmail, facebook, and Twitter account just for deals. This way, if I'm ever looking for sales or deals I can just check that account without compromising my identity or precious free time going through emails. I started just with gmail but have expanded to the others because there are so many facebook deals nowadays. Now, you may have to put in some more info on yourself than just your email. Most of that info might already be out there anyway and by giving your address you might get a lot of coupons in the mail, like I do. But if you don't want that...well no one ever said you had to provide "accurate" details to get the deals...just sayin'. Anyway, don't miss out on deals just because you're afraid to foray into social networking. Just set all your privacy settings, don't provide any pics or friend any one person, and you're golden. :-)