A very quick and easy way to save lots of money is to add water to many items around your home. Just because the manufacturer says you need to use X amount, doesn't mean you have to. Of course they want you to use more than really needed. You'll buy the product more often and boost their profits.
Just add water to these items and keep more money in your bank account.
Shampoo - This can be diluted by up to 50%. Even better, add a pump to the bottle for portion control.
Conditioner - The better the quality, the more you can dilute it. Add up to 50% water
Shower gel - Thick shower gel can be hard to spread over the body and many times falls to the bottom of the shower. Add 25 - 50% water and also add a pump or pour it into a pump bottle.
Laundry liquid - Adding too much laundry liquid to the wash can leave residue on your clothes. Not to mention the extremely strong smelling perfume they add to the liquid. Laundry liquid can be diluted by 80% and still give you clean, fresh smelling clothes. Give it a go. It really works.
Tinned soup - Chunky tinned soups can be diluted up to 50%. Even better, add a handful of small pasta shapes to stretch the soup further. I find these soups to be too rich in flavour and salt. Diluting them gives you more serves and lessens the salt intake. Of course homemade is better for you and cheaper.
Liquid hand soap - Dilute it by 75 - 80% and use it as foaming hand wash for a fraction of the store bought variety.
Fabric softener - We all know fabric softener is not good to use and certainly not good for the washing machine. If you need to use it to help remove smells, dilute it by at least 50%. Maybe the clothes won't smell like perfume when they are dry, but they will still have a fresh fragrance. For a cheaper alternative to remove bad smells, spray the offending odours with white vinegar before washing.
Kitchen detergent - If you are heavy handed with the kitchen detergent, dilute it by 50% and add a pump to the bottle. I've been doing this for years and my dishes are still clean and sparkling. Some of the Aldi kitchen detergents are really thick and can be diluted by 75%.