Elements of Style Question

As we move through the 22 rules, some get complex and have versions.  Do you do them all?  No, pick one version of the rule - but be prepared to tell the rule and to tell the exceptions or the variants.
So how do you pick?  Remember that part of your job is to express an interesting Sociological fact or observation, whether book-sociology or sociological patterns out there in the world.  So pick a variant of the rule with which you can express good Sociology. 
also remember, you express the sentence you create once incorrectly, then once correctly.