To help curb some of the bandwidth pain, Jim MacLeod of WildPackets identifies common issues and illustrates how to identify and overcome them.
Voice and Video over IP presents a case where you may indeed need to increase your bandwidth. If your company uses VoIP for communication with clients, or if you have applications that require VoIP, make sure that your network can handle it. VoIP is especially sensitive to jitter and packet loss, which could be caused by other traffic, so this is another category you want to protect.