Recently people have discovered the power of Shift + F3. This brings up a pie chart that displays special blocks in the rendered chunks. For example, if your in a plains or desert village and press Shift + F3 you can see a furnace on the debug screen underneath the pie chart you know that there is a blacksmith in that village. With a little more complexity, you can also do it for portal rooms. If you know you are in the near area (which you can know using triangulation) you can use this to find spawners and know where the portal room is. Especially after E - Ray was discovered the advantage of using F3 is so big that personally i think they should be seperated as two categories.