Good nutrition before surgery is not only important; in some cases, it may a requisite. Oftentimes, a doctor will recommend that a person lose weight before an operation or embark on a specific diet plan. Even if no specific recommendations are made, a diet rich in protein and certain nutrients (vitamin C and D, zinc, and calcium) can aid in your healing. You won't want to restrict calories before surgery or do anything drastic (unless your doctor has instructed you to) but rather focus on eating a healthy, balanced diet.
Routine exercise will improve your cardiovascular health and aid in muscle recovery should you require post-operative physical therapy. If you routinely workout, continue as normal but consider adding cardio work if you've been neglecting it. If you've just started exercising, don't push too aggressively, but, rather, work with your doctor to find an appropriate fitness program.
Quitting cigarettes should always be a consideration before undergoing surgery. Not only will you be healthier in the long run, but your post-operative outcomes may also be significantly improved. Smokers are typically at a higher risk of complications following surgery compared to non-smokers Similarly, they tend to have greater vascular constriction (narrower and harder vessels), resulting in longer recovery times and an increased risk of scarring, hospital readmission, and other health complications.
Make physical therapy appointments in advance to ensure you get the provider and appointment times you want.