Even when I buy lunch from the organic shop near my office, most of the products are wrapped in some form of plastic. Plastic gets everywhere. When its disposed it often finds its way into the sea where it can end up part of the Garbage Patch (please follow that link!). We need to reduce our dependence on plastics, here are some ways to start:
Refuse plastic carrier bags in shops - take your own reusable fabric carrier bag - I have two in my handbag so that even the most unexpected purchase can be carried home without a plastic carrier.
Avoid products that are packaged in plastic
When possible if buying vegetables, avoid putting them in plastic bags. This is easiest with items such as courgettes, which are often bought singly and are relatively clean. If you have a choice use small paper bags to wrap veg in rather than plastic bags. Cosider taking your own reusable produce bags.
Paper bags of course lead to litter too, but paper is biodegradeable and doesn't accumulate in oceans and destroy whole colonies of sea creatures. Ideally minimise all packaging and recycle or reuse whatever packaging materials you can recycle.
Another way to avoid so much packaging is to buy less stuff.
Some blogs committed to reducing use of plastics:
Fake Plastic Fish
Bring Your Own
Conserve Plastic Bags
Make A Bag
Bean Sprouts recently shared Ten Things You Didn't Know About Plastic Bags.