The one, important thing is to live far away from them. They're in the province and we're here in Metro Manila.
But seriously, if you can move out and be on your own and build your own lives, that helps a lot. Even my own siblings and I had much better relationships when we all moved out and had our own place. It also made family get-togethers more meaningful.
I just listen to them, be nice and give them thoughtful gifts or messages on special occasions (thankfully my in-laws are very nice and simple people anyway). I join family activities when we visit them and we take them out when they're in Manila. When i stay in their house when we visit, I also keep to my own or stay outside and just interact with them mostly during and after meals. My wife and her siblings all have their own lives and don't interfere much with each other. Walang hinahabol na kayaman or assets and they're all self reliant after graduating from college. They may give opinion on certain things and if there are disagreements, the decision is up to the person the issue concerns.