Mommying has required me to carry a tote-size, or larger, bag for what seems like forever - and have had to keep smaller things, chapstick, keys, cell phone in small pockets or bags so they don't go missing.
Clinique bags, the one's you get with your free gift with purchase, are perfect for toting a sock project or other little projects.

I recently received a GoKnit Pouch from my Secret Pal and I totally heart it. The loop is awesome to attach to my belt or stroller. I highly recommend loops on bags.