As the years go by, it seems many of us learn to value time so much more than prior years. Ironically

Write It Down –
A "to-do" list is tried and true. But you can use other tools, too -- the main thing
is to write it down somewhere. Whatever you use to keep track of things you need to do, it's better to have just one and keep it with you wherever you go -- on your cell phone for example. Some kind of list keeper or calendar app is probably on your phone already.
Is It Worth Your Time? –
Remember your big-picture goals and ask yourself if what you're
doing is likely to help you get there. For example, that extra hour spent at work on something
no one asked you to do might have been better spent at the gym or on the piano or at your child's baseball game.
Don't Cheat - If you schedule a work session at 9 a.m., stick to it -- 9:17 a.m. won't do, even if you work alone. Missing one start time will make you more likely to miss others. If you want some flexibility, allow yourself a choice -- return emails or file papers, for example -- but stick with the schedule as if it's set in stone. If you try it and find it doesn't work for you, you can
always change it
. Just Start It! - If you feel a strong urge to put things off, find a way to push past it and take even a small step forward. You'll feel better once you make a little progress and may soon find yourself in a real groove. That's because your attitude often comes from your behavior – and your results -- rather than the other way around.
All Your Time Counts - You've got a free 15-minute chunk of time before you have to be somewhere -- time to surf the Web and check social media, right? You might be surprised by what you can get done in that time. Four 15-minute chunks spread through the day is an hour of productivity. And you'll feel better about kicking back later.