Beginning, Middle and End is always good...a bit like a story.
Tell em, tell em and tell em again - what's that?
At the beginning of the presentation Tell them what the presentation is about, then tell them (deliver the presentation) and tell them again at the end in a summary...ie I'm going to explain my view on rum ration...rum ration is brill, i can drip all i like and no one cares, I can keep in touch with, etc, etc...so to summarise rum ration is great.
Always be prepared to identify a weakness - everyone knows you will tell them all about the good things. Dont offer it up unless they ask but if the question arises at least you have considered it - but then how have, or will, you address the weakness/developmental area.
It's always good to be able to provide examples, for example in my current role I have.... my line manager has praised me for... I have received positive feedback on... etc,etc
Hope this helps - I'm a trainer and do recruit assessing/interviewing in normal my job so used to dealing with issues such as this.
Good luck
Windy