My wife was diagnosed with PSP in 2012 at age 60. Here is a list of treatments we have employed to maintain a quality of life for her. As the disease has progressed I have taken actions listed below to fight the battle.
Vision - upward gaze ---Prism Glasses
Swallowing - Speech therapist, application of electrodes to neck to strengthen swallowing mussels
Mussel stiffness - Bowtox injections; sessions with physical therapist to train me on giving stretching exercises ; massage therapy weekly; Parkinson's exercise class
Lack of speaking ability - Speech Language Pathologist - Speech Technology (Control Bionics) utilizes a touch screen (or motion activated) tablet mounted on adjustable stand
PEG Tube for feeding when she could not longer swallow. Very easy to use and it took the pressure of me regarding preparation of meals she could swallow..
I hope this helps someone navigate.