You must try to understand the psychology of the audience who are going to evaluate your presentation. Try to put yourself in their position and think of their expectations. If you think that you can explain your concepts patiently with detailed slides, then you are definitely on the wrong side of the gun. Human nature by instincts is that, when they come to know about something new, they would not be patient to know it slowly and in a detailed style. They would try to grasp the concept quickly. You must frame your presentation to match this accord.
Approach
It is for sure that you know about the contents of the paper well as you have prepared it. Be composed and stay confident and do not express over confidence. You must be polite enough that other should feel that you are open to explain about the contents in the right manner. Even if the audience or judges throw a silly question to you, do not show sense of complacency in answering it. Value the people who are listening to you as they are the ones who in turn give feedback on your performance.
Language
Use simple language that can effectively communicate your ideas to the audience. Do not try and fail in adding vocabulary to your speech which is not going to be of great success, as the only basic criteria is whether people who listened to you understood what you delivered. In places other than the stage, be professional with your language in speaking to organizers and other people. Avoid using the regional languages while speaking to others and at the same time, do not project yourself as a figure of expertise in the science of languages.
Voice Projection
Be louder when you explain about the concepts. It is the confidence that you are going to exhibit through your voice. See to that you are delivering your contents on a high note. Never show any frustration on the stage if a section of crowd or someone else is not attentive. Concentrate on your concept and look at those who are at the edge of their seats to get your points. Check whether the audio system given to you is nice and fine when you are starting to present your paper. Do not be fast in giving out your speech. Be slower and clearer and your voice must be in a tone to please the audience.
Planning
Plan and deliver your speech with the time given to you. Be prepared to cut short your presentation if the time limit given to you is suddenly reduced by the organizers. These are the common things that can possibly happen to you. Never go out of your codes of conduct and argue with the organizers about various things. Keep aside the issues for the feedback session of the event and hold your patience. This will give a very god impression to your character. Win hearts by having a smiling face and control your emotions even if you are criticized on your concepts.