Azurite:
I noticed on Wikipedia that there's a handy portion of the templates that says how the template in question is supposed to be used...
This is done with the <noinclude> tag. For example, add this to your template:
<noinclude> == Usage == text... </noinclude>
Stuff inside the noinclude section gets displayed when you look at the template itself, but *not* when you include the template. <includeonly> is also useful. See:
http://meta.wikimedia.org/wiki/Help:Template
Personally, I prefer to put the usage info on the talk page for a template; then you can link to it explicitly. There's then a "Discussion" section after the help. But that's a matter of preference.
Ian