Is there a Cure for my Plastic Bag Habit?

Help!! I'm trying to give up buying plastic bags and it's harder than I thought.  To my own credit, I use far fewer than I used to.  I pack a mean, waste-free lunch.  I use glass and plastic storage containers for many, many things.  But I still find that I reach for that ubiquitous plastic bag more often than I would like.  I blame it mostly on having young kids and being in a hurry.  Lame excuse, but it's true.

I used up my stash of quart sized ziplocks a few weeks ago and I've been struggling to keep myself from buying a new box.  I'm washing and reusing the bags I have and I am saving all the plastic bags I get when I buy produce.  Any other suggestions for a (mostly) green gal who's still stuck on plastic?