You might be falling into the trap of making yourself think you’re making progress when you might not really be. Consider whether something you’ve put on your list is a small task that can be done almost as quickly as you write it down. If a task is only going to take you 5 to 10 minutes, such as sending a thank you note or paying a bill, just get it done.

Too Much on your To-Do List

We can legitimately expect that there will be an unforeseen glitch in most projects.By building in time at the end of each day or even during lunch for new tasks, we are able to finish things that come up, without sacrificing the productivity of completing our to-do list.
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Build in Time for the Unexpected

Work expands to fit the time available. That’s why we sometimes do our best, most efficient, work on deadline. You don’t want to create unnecessary stress on yourself, but at the same time, you don’t want to allow your work to expand so much that you keep working on something for longer than needed.

How Much Time Something Will Take

Many of us fall into the trap of thinking that if we’re busy doing something, we’re being productive. But “doing” is sometimes just a form of procrastinating.
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Doing Is Not Accomplishing

For many people, their top time thief is social media or aimlessly wandering the World Wide Web. For other, it is spending hours organizing their office.It’s not the task itself that’s the issue, it’s whether or not it is the right thing for YOU to be doing.
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Find your Time thief

We rarely actually take care of the email in the box, we just move it around as a sort of “reminder system,” which in reality usually only serves to create stress when you open your inbox. Set aside time to tackle your email, including unsubscribing from lists or newsletters you no longer value, and see how your productivity improves accordingly.
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Too Much Time on Email

The constant bling and buzz of our phone, email and texts can make it almost impossible to concentrate on what we’re working on. If you are in the midst of a project, turn off your notifiers so you can concentrate and finish what you’re working on and then tend to other matters.

Plan Your Own Time

Get more done in less time. That's the goal of almost every worker staring down a hefty to-do list. Today's worker almost always has more to do than time to do it - and that's not just work! Someone who's productive is not only able to do their work more efficiently but can enjoy the other parts of their life more fully.

Build in Time for the Unexpected

Similar ideas to Build in Time for the Unexpected

Account for your hours: The Time Blocking method

The Ivy Lee method for peak productivity

3. Follow the 80/20 rule