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Make a list the night before of the day's tasks in order of urgency and importance.  If you have a smartphone, then you have a powerful organizational tool at your fingertips! There are many useful apps for creating a concise and helpful to do list. Using an app can also help you keep your lists organized, rather than creating a sea of paper.   Remember, put the most difficult tasks at the top of your list. Starting the day with a positive accomplishment, however small, gets the ball of accomplishment for the rest of the day rolling. Then look at your prioritized list. Take each item one at a time, and let each task completed be a segue into the next. After each task is accomplished, the next words out of an effective and serious person's mouth are, "what's next?". Let that be your mantra. Always ask yourself, "what's next?". But don't get sidetracked! Specify what your break will entail. Think, "I'll finish this episode of my favorite show while I eat this banana, then back to the task at hand." Stick to it-once you let yourself slide off the schedule, it's a slippery slope to accomplishing nothing at all. Recognize that time is finite, and think of it as a resource. Be aware of the time you spend on a task. Don't become so swept up in mundane details that you waste time on things that don't matter. Ask yourself, "how is the time I'm spending on this advancing me toward my goal?   Be able to put things aside that are holding you back from accomplishing what you set out to accomplish, or, if the way you've chosen to go about a task isn't working, try something else. Be flexible; be malleable. Be able to bend without breaking. Knowing your limits isn't limiting, but freeing! Accepting that you have accomplished tasks to the best of your abilities is hugely rewarding. Remember, completing any task gives you a boost to accomplish more. Take simple steps, and continue to do so, and over time you will accomplish a great deal. Some rules can be changed and others cannot. Having the grace to change what you can and accept what you cannot is huge in being a more serious person. To fret over mundane details of life you wish could be different, but know deep down cannot, is to limit yourself. When you come upon an immovable obstacle, go around it, and proceed on your course.
Make a list. Get up in the morning and make your bed. Allow yourself a short break from time to time. Use your time wisely. Know how far you can go. Understand the rules of the game.