At the Toastmasters London Division competition, last year, Bob Ferguson delivered a great workshop: 45 minutes all worth it! Listen. The images were from his workshop also but added to this only to make a video that I can upload here.
The most important is, that to learn to do it well is a hard work. First gather lots of information, then practice them, practice and practice again. Listen, once, twice, three times even, then go for it!
Begin your own research and at every meeting, listen and for yourself alone, evaluate parts of the speech. Write down and next time, evaluate a new feature of speaking. Teach yourself to listen better and better, and learn to evaluate with time!
Become a Super Toasty! A super evaluator, too.