The tips begin at a different place in each module. The advice moves along with the stages of the course.
Every topic has an 'in itself' and a 'for the rest'. The 'in itself' includes the model systems, the traditional problems, conceptual vocabulary, and specific learning goals of the topic. Learning the 'in itself' gives you tacit knowledge 'for the rest'. Each scientific discipline has different methods for justifying the validity of its statements about the world. They are different disciplines with different traditions. However, there is only one science.