Those thin clear plastic bags used to weigh your fruit/veggies at the shop

Where ever possible, use reusable shopping bags or shop with your own basket.  Plastic bags can be reused to shop with and as bin liners, etc.  As for those thin clear plastic bags you weigh your veggies in at the grocery store, try to do without where possible although often the grocery store insists you do use them.  I reuse these bags for freezing stuff in instead of using zip lock bags/cling wrap and also use it in place of cling wrap for covering bowls in the fridge, etc (as long as they are 'clean', i.e. dry with no traces of dairy/meat).  They can also be re-used for throwing your bones / dairy / meat & other non-compostable scraps in to freeze and dispose of later. [Note: reason for freezing meat/dairy scraps - once you start recycling it takes forever to fill your 'landfill' bin therefore it is more hygenic to freeze non-compostable scraps such as meat and dairy - especially in summer].  Remember when weighing your veggies in these bags at the grocery shop, don't tie the bags too tight!  This will enable you to open them at home without having to damage them by tearing them open.