Your presentation skills give your words life. It is not a good idea to give a ‘canned’ presentation. Rehearse. Prepare and practice by all means – but let the material take second place to your energy and individuality. You want a certain outcome. If you fix your presentation too rigidly it becomes an end in itself rather than a means to an end.
Any effective talk must communicate your arguments and ideas, persuade your audience that they are true, and be interesting and entertaining. Business speakers sometimes forget about the third item, thinking (mistakenly) that work is serious and entertainment plays no part in formal presentations. Some think it follows automatically from the first two (it doesn't). Others believe that if a talk is entertaining, it can’t at the same time contain a serious message. Not true: you can communicate and persuade effectively and entertain at the same time. Keeping your audience interested and involved is essential because you need their full attention to get the message across.
Listening is hard work, especially at conferences. When audiences attend talks over a period of several hours, they need the speaker's help to maintain their focus, or one conference speech merges with another. This is the true meaning of "entertainment." With serious topics entertainment doesn't mean making your audience laugh out loud. Instead, it's about helping them stay focused on and interested in what you have to say.