Here are 3 tips for coping with a cancer diagnosis and treatment from the document: 1. Maintain a healthy diet full of antioxidants like green vegetables, tomatoes, broccoli, and blueberries which can help protect cells from damage and reduce cancer risk. 2. Recognize that physical appearance may change after treatment, so go into it expecting changes to have a better attitude when they occur. Ask the doctor what to expect. 3. Drink plenty of water to help with medications and prevent constipation, keeping cells healthy. Staying hydrated also helps prevent other health complications during chemotherapy.