Since December 3rd, I have analyzed about 40 positions extensively. A lot of little gems were unearthed. Now it is time to go back to these 40 positions, in order to derive a decent tree of scenario's from it. Only with such coherent framework of chess knowledge, I can hope to begin some serious tactical training.
The first step will be to erect a complete tree with all crude observations hanged in it provisionally. The second step will be to optimize all observations, so that the tree will act as a handy summary of adequate and relevant knowledge. The third step will be to distill a training method from it.
I'm working on the first step right now.