Obtain a professional portfolio case. The case should be constructed of leather or another durable material that will withstand being transported. Ideally, the case should be waterproof so your prints and artworks will not be damaged by the elements. You can purchase a professional portfolio case from an art supply store or order one online.
Make sure your portfolio will be appropriate for the school or gallery. Spend a few hours researching the types of works the gallery represents. If the gallery sells representational art, you will want to choose representational pieces for your portfolio. While you may be proud of your abstract artworks, it is better to leave those for another opportunity.
Ask a fellow artist or gallery owner to review your artworks. You will need to choose works for your portfolio carefully, so you will want to make sure the art you choose represents your best work. It can be difficult to objectively judge your own work, so looking for guidance will help you select the best works to present to others.
Select works that represent a unified theme. Many artists choose unrelated artworks in an attempt to demonstrate artistic diversity, but this makes it difficult for the admissions officer or gallery owner to properly assess your work. Make sure each of the pieces relate to the others in a way that you can convey in 50 words or less.
Limit your portfolio to no more than 20 pieces. In many cases, the gallery owner will have limited time to review your portfolio, so if you can narrow down the collection to 10 pieces, this will allow him to spend more time on each piece.
Put together a story that describes your perspective. While your prints or slides are important, your interpretation of these works is just as important. Your story will help the gallery owner or admissions officer understand your vision, and will help you “sell” your portfolio.