Occam's Razor in Medicine: What is it, and how can you use it?

Occam's razor (Also Ocham's razor or Ockham's razor) is a rule of thumb that experienced doctors use every day. I didn't learn about this concept until I was already in practice, although I had been applying it everyday.
Here Dr. Hilsden, talks about Occam's razor and how it can be used in medicine and in life.