Communicate your new schedule to your superiors, colleagues and any customers. But don't go overboard. If you're planning to regularly check email and voicemail, only inform people who would need to reach you urgently.
The first few months may require some fine tuning for you to get the workload right. Try to set realistic deadlines and expectations, so you're not working overtime unnecessarily. Differentiate between urgent tasks and those you can delegate or delay.