Pick a topic, from http://madwizard.com/engtopics.htm (Links to an external site.) (Links to an external site.)
Figure out the fundamental question
Figure out which side has the burden of proof
Find that side’s best argument, and describe that (“for”) argument .
Find and describe the other side’s best (“against”) argument(s)
Work out which of these two arguments is the weakest.
Explain what is specifically wrong with that weakest argument.