Put them in the refrigerator between uses, and wash them once a day as long as the baby does not have a medical need that requires washing or sterilizing between uses. Breastmilk is good in refrigeration for up to five days, so your pump parts will be fine in there for the day. Below in list form are the rest of the tips and tricks I have picked up while being an EPer. Your breasts are never really empty as they make milk in the moment, but they milk is only made if there is a demand for it so pumping more will make more.
That's where exclusive pumping comes in. Exclusive pumping is also called EPing and breast milk feeding. It is the process of removing the breast milk from your breasts at regular times throughout the day. You can then give that milk to your baby either by a bottle, tube feeding or through another alternative feeding method. But, exclusive pumping isn't necessarily an easy thing to do.
I was a research-happy pregnant woman. I read every book, watched every documentary, and basically tried to over-prepare in every imaginable way for the journey that lay before me. I made lists. I took classes. I planned a natural childbirth to be followed immediately with lots of skin-to-skin contact and, as soon as possible, breastfeeding.