Machine wash less
Generally, we machine wash our daily clothes too often. Unless you sweat a lot during the day, or your clothes get dirty daily, there is no reason to machine wash your clothes after every use. Normally, you can simply freshen them up by taking them out to air. Using an undergarment (for example a tank top) protects clothes from sweat. The only clothes we should wash often are underwear, undershirts and socks.
Remember to take care of your clothes: iron or steam them, remove pilling, fix small holes and secure loose buttons. It makes a huge difference.