Sure can. If you'll notice at the bottom of all the other help pages there's a little line that says:
[[Category:Help pages]]

This adds that term to a category page. I went ahead and added it to the writing tips page:

I also redirected "Quick Writing Tips" to "Quick writing tips" for uniformity:
http://wiki.fool.com/wiki/Help:Quick_writing_tips

All the categories are aggregated at:
http://wiki.fool.com/wiki/Category:Help_pages

Feel free to add any term to any category page. Other than automatically displaying all the terms that it contains, the category page works just like any other wiki page...so you can edit the text at will.