Organize the samples into separate topics. For example, work related to medical science might be divided into biology, anatomy, psychology and so on. Be as specific as you want.
Buy a three-ring binder with tabbed pages. Designate a tabbed page for each topic. Insert the work samples into their respective pages in the binder.
Write notes on the work samples when needed. For lengthy note-taking, write on a separate sheet of paper or notebook.
Make copies of the samples, if necessary. Keep these copies at your workplace or in another binder when traveling, studying or going to interviews.
Pay attention to formatting when using writing samples. Make notes on the length, writing style and other details of these samples. Practice developing your own professional writing skills with these notes.
Write down key facts, statistics and quotes mentioned in the samples. Make sure to correctly cite where these facts or passages came from.
Apply the facts and concepts from teacher samples when writing postgraduate entrance essays. The details pulled from these samples might enhance your application.