这是一个全新的专注方法，可以让你连续专注90分钟、记忆力提升到原本的150%，而且还能够让你更容易进入心流。而且，它不仅非常简单，还完全免费。这个方法叫做「随机提示音」，由自媒体博主「择恩」原创：1、 专注开始前，设置一个随机的提示音。例如，你可以设置一个 3 到 5 分钟的随机提示音，这个提示音会在 3 到 5 分钟的范围内，随机一个时间响起。2、 当你听到提示音的时候，立刻闭上眼睛休息 10 秒钟，10 秒后继续做你之前在做的事。3、 重复步骤1到2，一直到连续专注90 分钟。然后，去休息 20 分钟。20 分钟后，回来，再用这个方法专注 90 分钟，如此反复。以上，就是这个方法的全部流程，它是真的非常简单。

This is a brand-new focus method that allows you to concentrate for 90 minutes straight, boost your memory to 150% of its usual capacity, and slip into flow much more easily. What’s more, it’s not only extremely simple but also completely free.

The method is called “Random Reminder Sound”, and it was originally created by the content creator Ze’en:

Before you start focusing, set up a random reminder sound. For example, you can set a reminder that goes off at a random time within a 3-to-5-minute range.

When you hear the reminder, immediately close your eyes and rest for 10 seconds. After 10 seconds, continue doing whatever you were working on.

Repeat steps 1 and 2 until you’ve maintained 90 minutes of continuous focus. Then take a 20-minute break. After 20 minutes, come back and use the same method to focus for another 90 minutes, and repeat this cycle.

That’s the entire process of this method—it really is that simple.

如何做到长时间（4 个小时以上）精神专注？ - 择恩的回答 - 知乎 https://www.zhihu.com/question/20883403/answer/1940348616427444090

【为什么我能每天学习10小时】 https://www.bilibili.com/video/BV1naLozQEBq/?share_source=copy_web&vd_source=eba7ead3baa3d262a5be9ffe7184d3b4