What is best practice on how to arrange products within a given category/department?

Customers have the option to filter by designer, price, item type, etc., but I have not been able to find any information on how to merchandise/arrange the products on the aisle level category page.

For example, if the category is "Acme Home Decor", should I group all vases together, all dinnerware together, etc., or intersperse them on the page(s) to create the impression of variety?