What are some good sites or fast and quick apps i can use to get free stuff?

So i like to get free stuff, I'm currently looking for new stuff, i like amazon gift cards mostly, but i really want a iphone or a ps4, i have been saving up on amazon, is there any other cool sites to get samples of anything, sites for free gifts cards, or anything, i want electronics

I think you can get free paper clips if you look around hard enough.