I used to just carry a tiny little wallet in my back pocket but then life happened and all of a sudden I needed to carry pens, loose change, inhalers and receipts. I'm not entirely sure when this happened...maybe once I landed a full time job and needed to look slightly more professional. Of course, that implies that I looked professional to begin with and let me tell you...no. Even when I am dressed for an interview I still just feel like a little kid playing dress up.
Anyway, I typically dump my purse out once a week and clean all the clutter out. The receipts and shopping lists get tossed, the change gets put into a jar, the numerous pens and pencils get whittled down to one of each and my purse is once again clean and tidy.
Interesting factoid: Once I almost got a bigger purse but changed my mind in the checkout lane at Target because I knew that a bigger purse meant more clutter and mess.
Interesting factoid: I apply the same logic I use with a reusable shopping bag to my purse - if it doesn't fit, I don't need it. This is why I often only bring in one bag when I have to go to Target because otherwise I'll end up with a zillion things for which I have no need.