Internet as a saving tool

Why do I like Internet? Because it can also be used as a savings tool. Have you ever used Internet:
1. To find great offers, coupons, sales, discounts?
2. To learn foreign languages for free?
3. To learn through free webinars?
4. To find various and interesting recipes?
5. To call somebody on Skype with minimum cost?

If you never did it, just try it!