In addition to what has been said, OCF has great page links for the complications of treatments covering just about every topic.

http://www.oralcancerfoundation.org/complications/

Similarly, I like to break down treatments into several areas for my compliance, some of which, if not all, relate to one another, in order to get through treatments. A dysfunction in one area sometimes can cause a domino effect, and affect all

Adequate nutrition and hydration
Impeccable Oral Care
Neck Skin Care
Pain Control
Mucocitis Control
Infection Control
Dry mouth/Rope Mucus
Nause and Vomiting Control
Adequate Sleep/Rest
Light Exercise, Walking, Meditation,Yoga
Support, Assistance, Anxiety Care
Energy Conservation
Caretaker Care/Support