I only ever use half a tablet of washing powder and run the machine on extra quick programmes, our clothes always come out clean.
Any particular stains I rub with Fairy household soap, or grease based stains ones with a pre-wash stain remover, sainsbury's own brand is as good as any. Failing that, a day in the sun.
Hang clothes straight from the wash (better if you don't do the highest spin for cotton shirts) and they don't need ironing.
Tea tree oil in the final rinse of a nappy wash.
Fry onions in bulk and freeze.
Soft carrots will go crisp in a glass of cold water for half an hour.
Most things can be frozen, you don't have to rely on the the 'can be frozen' symbol.
Most sofa covers can go in the wash, and if they are cotton based, if you can wash them, you can re-dye them.