“Dress shabbily, they notice the dress. Dress impeccably, they notice the woman.”
When building a wardrobe, think quality instead of quantity. This is sometimes difficult and requires forethought and discipline. You need to put some thought into what pieces you need to build a cohesive wardrobe, and the discipline to not succumb to a weak moment and purchase random items that don’t fit into your plan (not to say you can’t ever buy a piece that you weren’t planning to, just evaluate whether or not it truly flatters your body and fits your current life situation).
This is not a “quick fix,” but over time, your wardrobe will consist of fabulous pieces you can rely on for a variety of situations.