For my business, I have to make a lot of phone calls. I also had to get a 800 number. With Verizon it cost me a boatload. I found out about VigorTel,com and since then I been paying $20 a month for unlimited call around the world.
Same goes here, I used to pay a boatload for faxing between paper, ink and a fax until I found out about eFax. It let me send faxes though my email, and that really saved me money.
Please post anything else that you have found that saved you money!