I am unsure of wether this constitutes grave digging or not, but I may as well resurrect this thread with a personal trick that helps a lot.
When I dream, something I find particularly useful is to draw what I have seen. Quick doodles and notes beside them are enough to keep a memory alive and even allow it to be explored. However, if you deviate from what happened in the dream, that can mess up exploration a tad.
Personally, I rarely get to note down my dreams. I'm always in such a rush in the mornings, and thus I forget them fairly quickly. Unfortunate, really.