The absolute best way for me is definitely going on vacation. Going to a place that you guys have never been to before, sharing that experience together, doing new things together, that will definitely strengthen your bond. And in the meantime, if you want to do something locally, do some type of interactive activity like painting with a twist, or I don't know, going to a museum, anything that allows you guys to work together or even have a friendly competition, those things are always perfect.