Just because it’s electronic mail instead of real mail, there is no reason to treat it any differently. If you were to let your emails accumulate for a bit like your normal mail, then you could tackle them all at once and be much more efficient. Email is a communication tool, not a to-do list. Do spend your entire day living in your inbox waiting for the one emergency. Instead, schedule a block of time to focus on emails. This allows you to manage your emails versus your emails managing you.