Do you work in an all-remote, global team?

I started hiring people for my business earlier this year and there are now 7 of us full-time scattered around the US, Europe, and (most recently) Southeast Asia.

I want to build a cohesive culture and ensure the team is able to effectively communicate, but being in vastly different timezones makes this especially tough.

So, I'm curious if any of you work in all-remote, global teams? How do you build a company culture? Effectively communicate?

I look forward to hearing your best practices.