An ensemble by definition is a group of complementary parts that combine to a single effect. Thus, depending on the effect or impression the person needs to create, appropriate individual items like shoes, pants and even handbag needs to be chosen well. If the occasions calls for something instantly attractive or flashy, designer options, like Louis Vuitton bags and accessories can be the right choice. If the situation is more personal, something casual, like True Religion jeans, may be in order to set a relaxed mood. If the situation is dominated by the weather, like the Christmas carolling with friends and loved ones, something appropriate, like sheepskin UGG boots, may be needed.
Note that these are obvious suggestions. However, the point remains that people need to have all of these to be able to use them. Spending a little helps, specially on items that are compatible for the image you wish to create. A little variety in your wardrobe can do wonders.