In the past, when I have been successful at weight loss, exercise has been a huge part of that success. Now I have more limitations. Exercise, particularly strenght and flexibility are going to be important to my health, probably even more so than before, but long cardio sessions are not going to play as big a role. So what do I have to work on? 

I think the answer is mindset. I need to fix what is inside, what let's me have goals, and then act against those goals. 

A book by Kelly McGonigal: The Willpower Instinct, has been helpful. 

What helps you?