This snippet gives you a Smart List with items in your current Time Block sorted by urgency and importance.
Once activated, you'll see a new item in your sidebar called "Current time block". When clicked, it shows the following view.
This workflow snippet uses the following strategies:
To show items in the current time block on this list the smart list uses an advanced filter "inCurrentTimeBlock" which checks if the items are in the current time block. It also checks that items aren't on the backburner.