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You can restore your attention span at any time by reading books, look at the phone for 2 hours and make a serious headway in your book.
Do these multiple things in your book. Start with short books because you will enjoy finishing them rapidly.
Scoring brain can also be reversed. So, decline in public order is a choice. You must learn how to focus, build yourself. So many distractions, social media, entertainment and all that.
You need some time, your major type of development, so that you can achieve a lot and make use of your time. That's how you get it, how you make use of your time.