Bob Ferguson about Developing an Evaluator
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.