I've heard of organizing todo items by importance and urgency, and I've even tried to do this in pima, but my approach was to use an absolute scale, e.g., 1=low, 10=high, and I would always have too many 10's.
So now I'm sorting them instead. If I click "important", it shows me two items to compare, and it keeps having me compare items until it knows the top 20 items. I can also adjust the sorting by clicking the down arrow next to any item to move that item down.
I also added an "easy" dimension, since what I often want are items that have a high benefit to cost ratio (where importance is sortof like benefit).
The green items are on the parato frontier — items for which nothing else is more important, urgent, and easy.
The gold item is just the currently selected item, which is open in an editor outside of this screenshot.