One tangible way that I can personally improve my relationship with other Christians is to talk to them and understand their traditions. It sounds simple, but I believe the key to actually improving a relationship is to know people better and to understand why people do things the way that they do.
Another tangible way is to research about what Christians are like in Eastern cultures versus in Western cultures, and how denominations can actually bring us together, united as one in Christ, rather than seen as a divisive theological difference with others around us.
The third tangible way is to go to churches of different denominations, as this can truly grow your faith and allow your mindset to be opened to how others praise God. Being able to witness His beauty in other environments, as long as Scripture is still being preached can be an incredible way to connect with others.