My first speech was at Instructor Training for the Navy. There was no preparation involved. It was simply to get our feet wet and all we had to do was say who we were, where we were from, and a bit about our favorite hobby and what it was.
Most people looked and sounded absolutely stupid, including me. The cool part was, they did a video of each of us and we all reviewed each person's micro presentation together. And, it worked! We had increasingly complex presentations of our own choosing and had to hit timing. This was back in the days before VGA projects so we had to use a real slide deck on an overhead projector as well as use a real chalk board and whatever props we could gin up. All recorded... all reviewed by everyone.
You can have your PC record your voice while you're practicing for free. Spend a bit of money on software and you can record your presentation and your voice and review it to find your ticks and bad presentation habits. It'll take a good amount of time before your first presentation but it'll be well worth it and you'll get better and better until you don't need to "watch yourself on TV" anymore. Rehearsals will always be key (I do a half dozen full rehearsals for each new presentation and at least two for old ones I've done before) to success.
It also helps to really practice with PowerPoint including practicing flipping back and forth between the presentation and SSMS or whatever you're presenting on. Also download and get REALLY good with a free product known as ZOOMIT.exe.
Don't feel bad about how long it takes to feel that a presentation is done. You have to be an SME on the subject, a well-spoken-easy-flowin' public speaker, an entertainer, and someone that can deal with interruption by questions (need to be sure you save some time for that) and the occasional heckler (very rare but you have to be calm and ready).
The keys to speaking well are 1) do be the SME... know your subject very well, 2) tell them what you're going to tell them, tell them, and then tell them what you just told them, and 3) relax. Pretend you're talking to your best friends about a subject you know well. Of course, you do have to keep track of time but that's also where practicing comes in.
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First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.
"Change is inevitable... change for the better is not".
"If "pre-optimization" is the root of all evil, then what does the resulting no optimization lead to?"
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)