Not taking care of products that touch your face
This hygiene mistake is twofold; the products that touch your face such as brushes, makeup, flannels, your phone, and then your hands. All these transfer hordes of dirt and bacteria on to your skin with the lightest of touch. Make sure you regularly wash any objects/products that regularly come into contact with your face, at least weekly. Of course you can’t sanitize your hands before you ever touch your face! But wash your hands properly after going to the bathroom or using public transport, and try to rest on your hands a little less to prevent that transfer or germs.