We usually remember only five to seven items as a time. Of course, we seldom take tests with that limited information.
The key is to organize larger blocks of information in ways that are meaningful to you. If you can organize 25 items into five groups of five you will find it much easier to manage.
Sometimes categories are obvious. Greek, Roman, Egyptian: nouns, verbs, adjectives: kingdom, phylum,class, order: or in the case of a grocery list, meats, vegetables, beverages. Here are some tips when the categories are not obvious.