What do you do when you must do many things in the same time?

I will order it. I will finish the important thing first.
For example if I have to take the test before present my project,
I will read book. When I finish to take the test, I will do my project.
It depends on important thing and date line.
However, I have to finish everything in the nearly time and I will do it as well as I can.

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