Will youtube 再生回数 増やす Ever Die?
http://charlienvum796.theburnward.com/20-resources-that-ll-make-you-better-at-youtube-shi-ting-hui-shu-zengyasu-2
Study by way of your presentation beforehand. Study all-around the subject, so that you are confident that you already know a lot more than your audience, even after you have spoken.