It is no doubt possible to be too concrete, too illustrative or anecdotal, but few inexperienced writers err this way. For most the soundest advice is to be seeking always for the picture, to be always turning general remarks into seeable examples. Don’t say, “Sororities teach girls the social graces.” Say, “Sorority life teaches a girl how to carry on a conversation while pouring tea, without sloshing the tea into the saucer.” Don’t say, “I like certain kinds of popular music very much.” Say, “Whenever I hear Gerber Sprinklittle play ‘Mississippi Man’ on the trombone, my socks creep up my ankles.” By Paul McHenry Roberts.
1 Historical review: Some topics are better understood if a brief historical review of the topic is presented to lead into the discussion of the moment. Such topics might include "a biographical sketch of a war hero," "an upcoming execution of a convicted criminal," or "drugs and the younger generation." Obviously there are many, many more topics that could be introduced by reviewing the history of the topic before the writer gets down to the nitty gritty of his paper. It is important that the historical review be brief so that it does not take over the paper.