Rhetoric and Logic
Take advantage of every opportunity to practice your communication skills so that when important occasions arise, you will have the gift, the style, the sharpness, the clarity, and the emotions to affect other people.
(Jim Rohn)
Some effort and indeed time shall be invested to better the skills of rhetoric and logic. And it is important to mind that these are skills, not talents, can be well exercised. It can even be likened to exercising one's physical body.
Logic is particularly important. It develops mental abilities so much valued in Western thought and society. Without this one is bound to stumble and, all too often, fall.
One will benefit from even a least time spent for rhetoric - even as minimal as some noteworthy examples, carefully studied and imitated. Even if a person will not speeches itself, he or she will demonstrate better ability to deliver properly rhetoric figures and thus to exercise the potential of the speech to its maximum. And, beyond question, even slightest touching upon the subject of rhetoric will enhance speeches later written or delivered impromptu (especially then!).