How much planning do you put into building your wardrobe?

I know some ladies have a very detailed plan or reasons they plan (like Kate with her ethics).

I also know others approach it more like serendipity.

To some extent I think wardrobe size/idealization and budget plays into this.

If you are a planner, I would love to hear about your planning style and/or see your plans! How is it working for you?

If you prefer a less structured style, I would love to hear why you prefer it that way and any guidelines you have for yourself and how it is working for you!

For either group-- does your clothing budget and ideals about the right wardrobe for you (size and otherwise) influence your planning style, or lack thereof?