What is to be done?

Following the great Russians, Nikolai G. Chernyshevsky and Vladimir I. Ulyanov among others, I ask myself more than one hundred times a day what should be done. This is pretty much important that you cannot waste your precious youth squandering for nothing. At the same time, however, this kind of activity would soon be reduced to a trifling self-laughing, ushering myself into a total stalemate. I am not able to identify where is the weakest link of a whole chain.

What is to be done, or what can you or I do?