My web app http://weekplan.net actually helps you follow the concept presented in the post: Put First Things First. Check it out, it might work for you.
tl;dr think about when you work the most efficiently, then try to get your schedule re-arranged around that. Almost as useful as "simply work faster!"
Agreed - I'm most productive in the morning, so I try to schedule most of my meetings / phone calls earlier in the day.
Unless you think about how few people actually manage their schedule this way, which is why this = actually helpful for a lot of people
very true - it only works if you put it into practice!