Block and Unblock

Something small but not trivial,
big but not boasting,
routine but not insignificant, 
down to earth but not vulgar.
And what is it then?
A vague idea one way or another.
How to be disciplined as well as imaginative?
Without the former, no work is done;
without the later, no work is worthwhile.
A call comes in, 
a disruption or an opportunity?
An idea flashes by,
good but not that good.
Pursue it--might be a waste of time;
if not--might live to regret.
Choices frequent,
decisions unsure.