"If you try to change three things at once, it will be difficult to assess the impact of any one change, and you'll be less likely to stick to the changes," says Glei. So start by pinpointing one thing that's really messing with your productivity, like constantly checking email, obsessive Slacking, or a needy co-worker.
Then focus on making changes to just that one behavior. "Maybe you commit to not checking your email or Slack for a 90-minute block each day," says Glei. "Or maybe you deliberately schedule all of your meetings to be after 11 a.m. for a week. Or perhaps you schedule a quick check-in every morning and afternoon with your needy collaborator for a week..."
During this experiment, try to notice what happens during the times you freed up. If you really were more productive, keep it going. Once you've made that a habit, you can experiment with tweaking something else.