Make Your Own Yogurt

This one is just about as simple as the buttermilk. Simply heat some milk in a pan until it is just hot. Remove from heat. Then add about 1/4 cup of plain yogurt. Again, you will need to hold some back for starter for the next batch every time. Cover your pan and wrap it in a towel or something that will help keep it warm. Let this set up at least overnight and you should have yogurt. You might like to add whatever you like to sweeten, but I like it plain, too. I've used jelly, jam, honey, sugar, applesauce or nuts. You can experiment and see what you like best. I think this yogurt has a richer flavor than store-bought and no high-fructose corn syrup. You may refrigerate at this point.

Make your Own Buttermilk

It's very simple and cheaper than purchasing it from the store. You will need to start with some buttermilk. I know, but you have to start somewhere.
You will need to always hold back 1/4 cup of buttermilk. I simply use the 1/2 gallon container it came in. Fill this with milk. Set this on your kitchen counter for 24 hours and you will have buttermilk. I usually shake it up at this point and return it to the fridge. I use 2 % milk usually so don't really know if 1% would even work.
Prices on just about all grocery items are increasing or the packages are getting smaller or both so I just thought I'd share one small thing we do to save. Will share more later.