Keep a bag in your bag
Keep a re-usable/cloth shopping bag with you so you can just say no to plastic whenever you shop!
Even better: get yourself a convenient, compact re-usable bag that will fit in your purse or the cup holder of your car so you always have it!
$: Locally, home-sewn, compact, fashion, 100% cotton bags available at Green Market on Sundays 12-4pm @Discovery Green.