So... How Fast Should D&D Combat Go?

Let's face it... D&D combat can be grueling at times. Turns can take forever, players don't pay attention, the DM has 1000 things he planned and wants to get through. It can be rough! So how should you pace your combat?----------Music provided by Kevin MacLeod (incompetech.com)Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0