User Sub Pages 

To create a sub page of your user page, simply type User:Bubba73/PageName into the search bar, and click go (replace PageName with what ever name you choose). You will be taken to the "no such page exixts" screen, one of the choses is "start the page". Click on that choice. Edit and save as on any wikpedia page. Note that anyone really wanting to find this will be able to do so. But no casual user will evenr know it is there unless you tell such a person. Yopu can have several such pages. For example i use User:DESiegel/Test for testing templates and wiki-code I am working on. 

By the way, other users can not see your watch list, even if they are admins. I suppsoe developers could see it via direct database access, but that is about it.  (talk)