(Since there are so many suffering from the problem...)
Do you feel that your memory is abandoning you? You can dramatically improve it with just one little tweak. STOP MULTITASKING NOW!
#Multitasking is not a skill. It's just a proven strategy for you to complete nothing and a great way to prevent you from staying focused on your current job. By the way, women seem to suffer a lot more from the curse of multitasking.
The real enemy, as you will find out in this article, is: alerts, notifications, to-do lists and endless information windows.
BONUS TIP by ME, in order to effectively get rid of distraction factors:
Start today this very interesting role-playing game. Whenever you hear a notification sound, turn your head to that sound source adopting the most indifferent style and face you have and then, immediately return to what you were doing. In case you haven't noticed, there are no emergencies and whenever there is one, you will inevitably find out either you check your notification or not.