DO NOT SCATTER YOUR POWERS
Engage in one kind of business only, and stick to it faithfully until you
succeed, or until your experience shows that you should abandon it. A constant
hammering on one nail will generally drive it home at last, so that it
can be clinched. When a man's undivided attention is centered on one object,
his mind will constantly be suggesting improvements of value, which would
escape him if his brain was occupied by a dozen different subjects at once.
Many a fortune has slipped through a man's fingers because he was engaged
in too many occupations at a time. There is good sense in the old caution
against having too many irons in the fire at once.