I am doing the same thing, having a specific Notebook just for TODO items. The problem I am trying to overcome is when using the TODO list on my iPhone Evernote App. The notifications keep going away, so I can not see over-due items in the pull-down notifications and the app badge (little red circle with #) goes away too as soon as I open the app. The built-in reminders as well as many 3rd party TODO apps all do this. Any thoughts? Maybe there is a 3rd party plug-in to Evernote that will accomplish the running TODO list better. Thanks.