Oh, and learn to love "Someday/Maybe" -- it is not just a dark little corner in the back of your closet where you shove all the junk you don't want to think about anymore; it is an important tool for managing one's sanity. Put only the project-level stuff on the someday/maybe list. Don't worry about creating next actions for these items.
I second this advice. Put on your context lists only NAs that you like to address within the next week. All others can rest in "Someday/Maybe". Off course it's significant to do your weekly review.
BTW I use separate lists for Someday and Maybe. So the status of the inlying projects are mor clear.