Have a common goal.
There will always be something that you as a couple don’t agree on and that is fine we don’t have to agree all the time. But lets say for instance something you disagree on is how much to save per month. What if you took it from a different angle? Set a goal of how much you want to have in your savings , when you want to have it buy and then do the math. If you both agree on the end result it will make deciding on the steps to get there so much easier.