What do I need to Understand versus What do I want to Understand

One of the most time consuming tasks is learning how to do something new.

Thus it is important we prioritise our learning at all times in order to maximise our use of available time.

What do need to understand to complete our tasks?  These must be identified and acted on. 

What do we want to understand? These must be acted on, but deferred, until we have acted on what we need to understand and are able to do that efficiently.