This ToteSavvy organizer has been a huge lifesaver for me. I don't own a diaper bag, but instead just have this thing because it makes any bag a diaper bag. I can keep all of our essentials in there and just move the whole organizer from one bag to another. It comes in various colors and they also have a mini version for smaller bags. Heck, I would use that baby or not!
what I'm wearing:
shirt: DL1961 Nassau & Manhattan Shirt (best button down I've been able to find!)
booties: Treasure&Bond Winsor Block Heel Bootie (true to size and under $100)
bag organizer: ToteSavvy
sunglasses: Le Specs Half Moon Magic (under $60!)