As you're throwing down the double brackets to create a new article, ask yourself, "How would another article link to it?"  That is, "What is the most common -- and generally, shortest -- way of referring to the point of this article?"  

If you created a link to...

<code>[[Bruno Bettelheim's Uses of Enchantment]]</code>

...another article linking to it would have to use all those words (with perhaps a vertical bar to shorten what's displayed).  Better to link to...

<code>[[Uses of Enchantment]]</code>

...which another article is more likely to reference.  And if you want to create a bio of Bruno Bettelheim, make that its own article.

Is it possible to change the name of an article once it's created?  Yes, but it's a pain in the ass, and can result in broken links.  Better to spend 30 seconds to really think about it before you create it.