There are several general courses offered by the GSLS. They are listed on the PhD Course Centre website

Some of us have taken and recommend the following courses:
  • Academic Writing by Linda McPhee
  • Biostatistics organized by the Julius Center
  • Time Managment course

Free online courses (various disciplines):
Coursera

Epigenetic Control of Gene Expression in Coursera is a great course. It covers the principles of epigenetic control of gene expression, how epigenetic control contributes to cellular differentiation and development, and how it goes wrong in disease.The weekly quizzes are somewhat challenging, and the lectures take approximately 2 hours per week, but the effort is definitely worth it.