Others have covered the practical use knots, so I want to throw a couple fun ones out there:

• Double carrick bend
• Monkey’s fist

If you’re into crafts, friendship bracelets use half hitches. Macrame and tatting are also variations on tying knots in patterns.

There’s !imadethis@lemmy.zip for any hobby that produces something, but that leaves out the activity-based hobbies

My local library uses overdrive for ebooks, which you can check out and either download for kindle, download as epub, or read online in your internet browser. I usually download to an eink reader, but if I’m reading on my phone I use the read in browser option.

Suggestion: if you plan to read on your phone, look in the settings to set the background and text color of whatever app you choose to something that doesn’t strain your eyes.

Estate sales are another option, though your mileage may vary.

You could try attacking with hordes of low CR enemies instead of a few high CR ones.

Download + offline listening is also something I look for in a music app. I just went through the free trials for deezer and qobuz. Deezer’s download was straight up stupid - I couldn’t find a way to force it to immediately download updates after modifying a playlist. With qobuz you could force the download immediately, but it makes you select “download only” before you start the music, or it defaults to streaming. Every single time. Sometimes the playlist got corrupted too if a song was removed. I’m almost ready to start buying music again…