1.- Communication. You need to improve and build new processes that focus on facilitating communication, but stop short of overwhelming your team with bureaucratic processes.
2.- Documentation. Where in physical offices, there can be room for a little chaos and tribal knowledge, in remote companies you need to push a culture of documenting everything, having structures in place regarding regular meetings, policies, operating procedures, etc.
3.- Scorecards. Quarters fly by and with a physical office, team members talk in person about progress, issues and whether they need help - often these come up organically. With remote, if you want to have any idea if your team's projects are truly done, where there were bottlenecks, and if there are unresolved issues, you need to set up structured meetings and have scorecard checks in order to catch problems early and avoid micromanaging.