Clothes are the easiest because their rarity value is extremely low. Photographs and letters, on the other hand, not only have a high sentimental value but also are one of a kind; therefore, they should be left until last. This is true for photographs, in particular, because they tend to turn up at random while sorting through other categories and in the most unexpected places, such as between books and papers. The best sequence is this: clothes first, then books, papers, komono (miscellany), and lastly, mementos.
