The other day I attended a class on time management. One of the topics was email, and it was the suggestion of the instructor that we check our email at specific times. People will wait.
The training ended at 10:30. I had another meeting at 10:30, one to which I really ought not to have been late. I power-walked over to the other building and arrived only a minute or two late.
Me: “Has it started?”
Me: “Are they in there?”
Secretary: “Yes… wait a minute. Your meeting was rescheduled. Check your email.”