Less Travel
Internet telephony can be extended beyond simple voice calls. Once a camera is added, videoconferencing becomes an option so you can see the people you are talking to.
It's also possible to display product designs or documents etc. online, that can be reviewed and/or amended by several people, at the same time. This means decisions can be made there and then without anyone having to drive to meetings or leave the office.
Some companies are using broadband to set up permanent video links between offices so that people can communicate effectively with their colleagues at any time.
If you want to take advantage of some of these opportunities, then you can use products such as Microsoft Netmeeting, which are free to download and pretty simple to use.