These tips aren’t the greatest, but they do have a variety of “ways-in” to opening up your esssay. I personally relate it to something in my life, a meditation, or poignant issue. Most of all, an opening line should grab your attention and lure you in. If you’re not interested, then probably no one else will be either.
Make your opening exciting so when your thesis takes the stage, we are already spellbound!
http://grammar.about.com/od/developingessays/a/How-To-Begin-An-Essay-13-Engaging-Strategies-With-Examples.htm