Just having a place to show up to and people to show up with.
I'm with Lynn.. the dojo itself. Yeah not itself a technique but a safe and peaceful place in which to explore them all.
Not to mention the amazing teachers I have and my fellow students. Perhaps you might focus on appreciating those aspects of training. We focus on technique all the time but perhaps don't take the time often to really consider the gift we have in each other and the place we train at.