Lincoln Douglas, Public Forum, and Extemporaneous Debate are persuasive speaking events. Your speech must be geared toward the average, non-technical college-graduate-level audience. You do not need to 'dumb it down' for a Reality-TV audience, but if you are talking too fast, or using undefined jargon - even common LD terms like Utilitarianism or Categorical Imperative - you are hurting your chances. And refer to arguments by their substance, not name dropping - not 'My Plato Card' but 'the philosopher-king argument.' And you must be polite to your opponent, no matter how obnoxious they are.

In LD, your value and criterion count - this is how all of your arguments will be judged, as well as any impacts. If you prove horrible war crimes will be committed under your opponent's case, but have conceded the value of real politick and your opponent effectively argues those war crimes will improve the political standing of the perpetrator, then no matter how morally reprehensible the crimes committed, there is no impact under that value. Conceding the value is fine, if you think you can win under theirs, but understand the full ramifications of doing so are not merely saving time for your clever sub-points, but conceding how they will be judged.

In Extempt Debate, you only have at most two minutes - keep your evidence to statistics and use your own arguments - you really don't have enough time for anything else - which is the point. And avoid the temptation to try to fit 5 minutes of speech into a two-minute speech - if you are speaking too fast to take notes, you are by definition saying nothing noteworthy.

For speech events - clarity is the most important part of any speech - not just clarity of speech, but clarity of meaning and clarity of purpose. If you move, move for a purpose. If you speak oddly or with a heavy accent that is barely comprehensible, it still needs to clearly communicate something; the emotions of the phrase we can't understand, at the very least.

Finally, never tell the judge she MUST vote for you - the judge must vote for whom they think won - declaring yourself the winner is generally bad form, no matter how badly you have trounced your opponent. Forcefully argue in your voters or final speech why you think you won, but no mic drop.

Topicality is crucial in debate, while a debater may bring up a creative point or piece of evidence , that doesn't mean it will weigh in the debate round if it is not topical.  I recognize that a debater should not only defend their case, but put out evidence refuting their opponent. In LD debate we are dealing with a values based debate so, we should have evidence besides emphircal facts and figures and a debater would do well to use philopshy to show why something "ought" to be a certain way. Performance is a part of debate. Debaters should be able to communicate effectively and not just speed thru a round. It is the quality of the evidence, NOT the amount of evidence that wins a debate case. I do not support the use of counterplans in LD. A critique could work in LD, BUT I have seen very few supported effectively, so this should be done with extreme caution. Avoid using jargon, in the real world people don't use "cards" they use evidence. Speed should be like you were giving a speech, not selling at an auction. Debaters who use philsophy in LD have the advantage because they can prove what is suppose to be and not what merely is in the real world.