Effective Intro..

An effective intro should basically hit all the high points of the topic without getting too detailed. For example, if your topic is on shoes, you could put what shoes are and what you use them for without too many details(names of shoes, names of companies that make shoes, etc.). Another way to make your introduction effective is to make it appealing and/or interesting. The beginning of a paragraph or paper or whatever, is supposed to pull the reader in and make them want to read it. Basically the introduction is how people decide  if they want to keep reading it or say "Boo, this sucks!", and move on to something else.