I read a good guide by 'immindragon' on how to find your way underground here: http://www.terracraft.net/knowing-your- ... ind-north/
Using identifying factors on certain blocks, and without a compass, you can find which direction you're facing, pretty easily.
http://www.terracraft.net/knowing-your- ... ind-north/
Using identifying factors on certain blocks, and without a compass, you can find which direction you're facing, pretty easily.