Flow is the way you distill the other side's arguement or speeches to specific points that you can counter. If you can't figure out what they said, how can you possibly tell them that they are wrong?
[insert picture of flow that is on a disc that my computer is not recognizing]
[again.]
The picture that you are not seeing is of a page in a notebook. It is divided vertically into six sections (one for each debate).
Listen closely - generally people will state their contentions in their introduction. If not, try to find their main points - don't just write their examples down. It also helps if you abbreviate words. The less time spent actually writing things down, the more time can be spent listening and formulating your own arguments.
If two people address the same argument, connect the two sections with an arrow. If someone forgets to argue a point, draw an x or an arrow to note that they dropped the argument.