Making your own yogurt is another simple switch you can make. We get our milk in returnable glass bottles, so making our own yogurt cuts down on a lot of packaging. And yogurt is really good for you--it's a fermented food, and incorporating fermented foods into your diet has tons of benefits for your digestive health. If you are curious about fermenting, I would check out Michael Pollan's book Cooked (which has a whole section on fermentation), and look at the Zero Waste Chef's blog.
Anyway, you do not need a yogurt maker to make your own yogurt--you can just as easily make it on the stove in a pan, and there is very little hands on time. I follow Martha Stewart's instructions (there are only 4 simple steps!).
If you aren't familiar with Plastic Free July, take a look at this post. Basically, it's a month-long challenge to reduce the amount of disposable plastic you use. It's a great starting point if you just want to give cutting out disposable plastic a try.
My first Plastic Free July was in 2013(!), and this month I'd like to highlight some of the things I do to reduce my plastic use, and some struggles. Many things are part of my routine at this point (buying in bulk, refusing plastic silverware, etc.), but I am not perfect, and I always find this challenge to be a good time to refocus and look at what trash I am actually producing.