This is my portfolio with about 6 years of experience in product design.
My advice is to first be able to tell a good story and attune it to the party that you are in conversation with.
Then you need good supporting visual / tangible material. Show process but only when it supports the story of the project, what is more important that it becomes clear through your work what your vision and goals are as a designer.
I am still looking to improve my portfolio for next year, I will use a more distinctive layout with more pages and less and larger photographs.