To have a ToDo before the logout in the menu bar, where a user can have a text area for working purposes.
1. It can be used as bookmark to save links to important or to be merited posts.
2. Used to list and track progress of tasks to be accomplished.
3. Working space for campaign managers.
4. Can encourage work on the site even when not close to a computer.
Thanks!
While a "favorites" list
might somewhat make sense (to cover at least your point #1), the rest are not actual features for the forum, hence I would not have too much of hope for a ToDo space getting implemented.
#1. can be handled with browser bookmarks, just make a "folder" just for this purpose
#2. I guess that your best option is 3rd party software/website. This can even help your privacy on bitcointalk.
#3. Campaign managers better use for their work either offline tools, either tools that save everything *very* often; a text box can too easily lead to things (work) getting lost.
#4. Sorry, I didn't understand what you meant.