There are a few reasons you should create an !Inbox notebook. First, keeping the notebook at the top of your list will remind you that you need to go through it on a daily basis to tag notes and move them to their proper places.
As an example, my stacks include the following: Internet Business, Travel, Personal, Financial and Health.Idea
#36: Keep Copies of Everything You Sign
Idea #49: Clip Restaurant Ideas
Idea #55: Create a Gift Idea Database
Idea #56: Create a Spiritual Guide