It's no big deal to reuse plastic ziplock baggies. I just rinse them out, hang them to dry, and they can be reused over and over. (Not feasible if something other than a dry solid was in the bag!)
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Natural-ingredient shampoo "bars" such as at LUSH last a VERY long time and involve almost no packaging.
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If you are going to compost, it's worth while to invest $10- in some worms to get you started.?  Check on your city/town's website before buying things like compost bins - they usually have them much cheaper than home depot.?  Rain barrels - get as many as you can.? 

