Practice doing everything with 1/2 of the product you would normally use. For example: 1/2 the normal laundry soap ! Clothes will be just as clean and laundry soap wil last 2x as long with means you spent 1/2 as much on laundry soap !
I use this rule with:
dog flea stuff
paper of all kinds
Use your imagination and try things out and see what works just as well if you onnly use 1/2 as much !