Time Management. Urgent vs Important
http://www.time-management-basics.com/time-management-urgent-v-important2.shtml
Urgent
Urgent tasks are deadline based. This is usually independent of yourself and is often driven by others. The sooner the task needs completion the More urgent it is. This has no relation to importance.
Important
The importance of a job drives how much 'time' you want to spend on it. Notice that this is independent of 'urgency' and is what you want to do not what you Actually spend on it. For any task the quality of your output will often relate to the time you spend on it.

