I use Borax in several ways.
-50/50 borax and baking soda replaces dishwasher detergent.
-use the same mixture instead of Comet when cleaning the sink or as an abrasive when cleaning your pots and pans.
-I use a few scoops of the same to swish in the toilet. Straight borax works great too.
-I use borax in my homemade laundry detergent.
You should be able to find borax in the laundry section of your grocery store.