Written as I would speak this:
Speak the speech, I pray you, as I pronounced it to you, trippingly on the tongue: but if you mouth it, as many of your players do, I had lief the town-crier spoke my lines. Nor do not saw the air too much with your hand, thus, but use all gently; for in the very torrent, tempest, and as I may say, the whirlwind of passion, you must acquire and beget a temperance that may give it smoothness.
Hamlet, Act 3, Scene 2. Hamlet speaks, instructing the performers of the 'Mousetrap' play he has contrived to test his mother with. And also we hear William Shakespeare speak: Playwrite, Actor and, obviously, frustrated director, who has directed far too many actors who did mouth the words and saw the air.
Dr. R. V. Jones, Director of British Scientific Intelligence during WWII recounts in his book 'The Wizard War' (P. 386, (C) 1978 Coward, McCann & Geoghegan, Inc. Dewey decimal: 940.548 J)
"...I acquired the two secrets of lecturing from which everything else follows: first, to believe that you have something worth telling your audience, and then to imagine yourself as one of that audience. Nearly all the advice that I have seen given to would-be lecturers deals with the trimmings without mentioning the fundamentals: but if you get these right, they entail all the rest. You must, for example, talk in terms that appeal to the background-experience of your audience. You must be audible at the back of the room, where the details of your lantern slides must be visible and your blackboard writing legible; and you should not distract your audience with antics and fidgeting. You must also detect by the change in tension when you are in danger of losing its interest. But all these follow from the simple consideration of trying to regard yourself from the point of view of a member of the audience in the back row. Even now I can not claim to satisfy all these criteria: but if I have any merit as a lecturer it derives from those glorious days of lecturing to as gallant and alert a band of men as any speaker could ever address."
General Advice
There is a particularly famous, world renowned, Tai Chi Instructor who has his studio (teaching hall) in Brazil. And if you enter his studio you'd find it to be a large open room. Over here are students practicing the partnered long form. Over there are some students practicing the spear form. Back there is someone practicing the sword form. And way in the back, in a corner, is the master's son. Who is practicing, over and over, the single posture (move) known as 'stepping out', the first move beginning Tai Chi students are taught. In the west it is called 'stepping out'. In Chinese there is no name for it. When the ancient practicioners were naming postures like 'snake-creeps-down' and 'gold pheasant stands on one leg' they didn't bother giving a clever name to this posture. They didn't think it needed a name, it was just the first thing you did, without calling it anything. And this is what the master's son does, repeatedly.
I'm not too concerned about the rest of the students but the master's son I respect. He knows that getting the basics right is the hard part. Once you get the basics down, everything else will follow.
A Tai Chi instructor once told me that if you get any one aspect of a posture 100% correct then the perfect form will follow. I asked if maybe 2 parts both 90% right would do because 90+90 is 180%. He said, "no, you have to get a 100% of something right." Probably why every six months or so I discover I've been doing 'stepping-out' completely wrong. But I keep working on the basics.