When deciding what is best to showcase your artwork in your portfolio, it is best to decide what it is that will bring in potential clients that will broaden your scope as an artist or designer in your chosen field.

Try arranging your portfolio space into sections, starting from basic quality sketches up to finished paintings or digital work and build from there, ideally you want to have current work that is of a high standard if you want to proceed and get commissioned on a regular basis and so you use your portfolio as an up to date showcase of current work that you have created or used for other clients.

I myself am constantly adding to and refining my own portfolio making it more easy to just browse through with labels at the tops of each page in their respected sections and with a small cover sheet at the beginning giving my name and contact details for the future clients reference, with also a short summary of my past design work if any etc.

You can include a cv, but only if it is current and relevant to your commission proposal or it has past or present design related companies you may have worked for, or maybe you have an in depth knowledge of a related subject that just might get your foot in the door.