While I was checking my RD (Reader Digest) posts slackerly, I came across this article. I will just summarize it as todo list. I hope it will help you to do something useful for yourself when you are "bored".
Eleven Productive Things You Can Do in the Next 5 Minutes When You are Bored!!
[01] Write a to-do list

[02] Do some dusting
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[03] Visualize your next task
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[04] Sneak in some exercise
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[05] Read an article
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[06] Talk to people around you
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[07] Clean out files
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[08] Make a phone call
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[09] Water your plants
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[10] Check your email
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[11] Embrace the boredom
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All images are taken from www.rd.com
Read Full Article by Marissa Laliberte: https://www.rd.com/advice/work-career/what-to-do-when-bored/