Joining the challenge and this thread somewhat late...
On shopping habits: I tend to browse online retailers, "add things to cart" quite often, and follow Angie's blog as ways to think about style and to keep up with trends, but most of the time I don't click on that little "purchase" button. Then after a looooong time of thinking, deliberating, and agonizing, I prioritize, pare down my cart and go for the items I truly want. I also enjoy going to stores and trying on things without necessarily buying them, but have less and less time to do it.
On what I want to change: I wish I could do more planning for both BUDGET and NEEDS. I.e. have more of a sense of what I have, of the holes in my wardrobe, then rank those holes, then set a seasonal budget and stick to it. I go more with the flow of instinct and habit, and while it all seems to work out, I am sure I could save time, money, and space if I planned better.
I need spreadsheets!