This isn't a specific story, but I remember slapping myself on the forehead the first time I heard the phrase "Jack of all trades, master of none." I used to want to learn everything, from web dev to drawing to cooking and beyond. That kind of enthusiasm is great, but it's so impractical.
The web evolves way too fast for any one person to be able to keep up with everything. Reluctantly, I've learned to accept that fact. I still occasionally fall into the habit of chasing the latest frameworks or tools, but I now put much more value on mastering whatever works for me. I'm pretty well dedicated to learning React at this point. I'm interested in Vue and curious what's going on with Angular, but there aren't enough hours in a day for me to give all of them the attention they deserve.
In the morning, when I'm reading through newsletters, I force myself to ignore anything that isn't related to what I'm currently learning or working on. Of course I want to know about Methods for Controlling Spacing in Web Typography, but it's probably more important for me to give my time and attention to Plain D3 Code and React Working Together.
Choices are important, and we have to be smart enough and confident enough to not choose everything.