Companies are eager to send out sample products or coupons to consumers in a position to publicize their products or services. If you have a blog or own a website, write to the companies whose products you enjoy and ask for samples in exchange for a review of their products. It's a win-win situation. You get free stuff, and they get a little bit of publicity. It's part of what they do to maintain good customer relations. Don’t have a blog? Write in directly to the company and express your opinions on the company's products … many times you could receive freebies for your valuable feedback.
If you love reviewing products, Amazon offers a “Vine” program that allows the best reviewers to receive free merchandise in return for an honest unbiased review. Currently it is “invite-only,” but many reviewers have been accepted after reviewing less than 30 products. So post a thoughtful review of current items you own for your chance to score brand new items for free from Amazon!