Add note about system tiddler naming conventions

editions/tw5.com/tiddlers/tips/TitlesPolicy.tid

@@ -1,5 +1,5 @@
 created: 20130825103300000
-modified: 20131129100159005
+modified: 20140122173818924
 tags: tips
 title: TitlesPolicy
 type: text/vnd.tiddlywiki
@@ -12,7 +12,11 @@ Recording a formal titling policy can help to reduce confusion. For example, the
 ** e.g. [[task]], [[demo]]
 * Use CamelCase for definitions and concepts
 ** e.g. TiddlerFields, DeveloperDocs
-* Use separate words for titles that are full phrases or sentences, such as FAQs, howtos or tasks
+* Use separate words for titles that are full phrases or sentences, such as FAQ, howtos or tasks
 ** e.g. [[How to build a TiddlyWiki5 from individual tiddlers]]
 * Where TiddlyWiki or TiddlyWiki5 is used as a qualifier at the start of the title, always use separate words
 ** e.g. [[Saving with TiddlyFox]]
+
+Policies that may make sense for your own wikis include:
+
+* Use the prefix `$:/_` for any system tiddlers that you create to ensure that they are near the top of the system tiddler listing in the sidebar