What is the best lock?

This is how I lock my bike if I want to be sure that it's there for a prolong period of time (just pretend the long metal stick is a lamp post or summat);

Sheldon Brown method is this, thought I didn't dare to try it as it might give the theft the wrong idea that I lock my bike up badly and try and attempt to removed it;

get the RH crank in to fill the space in the U lock.