Personally I've been adding more cooked veggies to my diet to make them more digestable. I bring my lunch to work more so that I have control over the types of food that go into my system. When I cannot eat a homemade lunch or dinner, I look for lighter options or smaller portions of things that I know won't damage my system personally.
My diet overall consists now of more veggies, some lean protein (chicken and salmon, primarily), eggs, quinoa, brown rice, greek yogurt. And yes sweet potatoes and avocados are included in that. I make a fresh guacamole and top a sweet potato with that and some greek yogurt...LOVELY and DELISH!. Also, I drink a ton of water. I usually stick to water, tea and the occasional alcoholic beverage. Watch your portions! I bought a food scale for my kitchen and realized I was consuming much more than my eyes believed I was.
Diet is very important and I tend to eat clean majority of the time, but what has especially helped me personally is making sure to keep physically active as many days as possible even if it's just going for a walk and getting in those 10,000 steps. I strength train via bootcamps 1 -2x weekly and now do 2-3 days of cardio in addition to that.