Take a look at the Area lists at the bottom of the review menu. These will be great for higher altitude reviews, eg "Well, why don't i have any active projects under 'Quality Time with the Kids'" or "Someday/Maybes are really building up under 'Research and Development'".
(same location as before).
Someone asked about Subprojects. I think at the moment the complications they bring to the dashboards, lists and overall UI outweigh the benefits. The suggested work around is to name projects like so:
- Big Project
- Big Project - Part 1
- Big Project - Part 2
It's not ideal. Or you could make an Area that encompasses a group of projects. Or even a Realm if it's useful. I haven't entirely given up on subprojects though. But there's too much else to do at the moment.