Asklemmy

At work, I have a reputation for being the guy who never shuts up about trying to get new people into scuba diving. If there are 2 or more divers at the lunch table I honestly feel a little bad for everybody else. The cost of getting trained and renting or buying all your gear can scare people away, but I would at least strongly recommend that anybody on an island vacation or cruise at least try a "discover Scuba" class. You'll learn everything you need to know to not die by watching a quick video, and working in a pool, then you get to go have an amazing dive in the ocean with an instructor.

Self-hosting. You learn how to use Linux, security, managing services, and after all that you have your own little ship on the internet. After all that you gain a massive understanding of how the internet and the technology you use daily work and run (to an extent).

Playing an instrument. The challenge of playing successfully a melody will give you more reward than listening to a good one.

Juggling is fun and makes you really great at throwing things (but only mildly better at catching them hehe) 👍

Wood working. Can fix things and build things. It’s very rewarding. Can find second hand tools and slowly build your collection and upgrade them as you develop and hone your skills until your wife surprises you at home with your closest friends and family and they proceed to tell you that you have a problem and have to decide between investing time and energy into a living family or your woodworking hobby.

• making bread
• brewing beer (or making wine or cider, as one prefers)
• repair sewing

I suspect I'd feel the same about welding or smithing, but I haven't tried those (yet).

Ham radio. It's a lot of fun and has something for everyone. I like the outdoors, so I took my portable gear to a park and operated Parks on the Air today. There are all kinds of digital modes for people who love computers, there's morse code, there's using kites to hoist your antenna, hot air balloons, talking with the space station, etc. All kinds of stuff. If you're the least bit nerdy, it likely has something for you.

Writing and drawing!

It requires no upfront investment, can be done individually, and it's one of the few arts which is constrained by skill rather than budget. You can write a bestseller novel with just your computer but good luck doing a blockbuster film on your own.

Mindfulness and Breathwork! Mindfulness is an incredibly valuable practice that can be a game changer for mental health and anxiety. Breathwork goes a long way as a fundamental technique.

There are a variety of free tier apps like InsightTimer that have beginner courses in meditation. Working to create space in your life between things like work and family give you breathing room. Starting to live in the moment allows you to step out of the anxiety of the past and worry of the future.

tying knots. All you need is a couple of pieces of string to get started. The right knot, well tied, is like a good friend - you can count on it. Shipyard workers sometimes make fun of how inexperienced mariners tie up their boats to a dock with "if you can't tie a knot, tie a lot!?" (full disclosure, I am a sailor).

someone else mentioned sign language - that is also extremely useful sometimes! My wife and I learned it when we learned to SCUBA. We do not have any deaf friends, but sometimes you meet a person who is reliant on sign, and if you can at least spell out some words, 'they are so grateful'.

Cooking. So many people don't even have the bare minimum ability to throw something together from raw ingredients that's vaguely nutritious, palatable, and won't give anyone food poisoning, so of course start there - it's so much cheaper than ready meals and there are plenty of recipes that are fast if time constraints are why you use ready meals. In fact, a trick I've always used is to cook something that serves 4-6 people, divide the extra into tubs, and freeze it. That's a few nights where making dinner is as quick and simple as defrosting something, maybe boiling some rice or pasta to go with. Do this with a half-dozen meals and you can alternate and not have to cook for weeks.

Beyond that though, learning a little more about flavour and technique, how to season a dish like a pro, some more unusual flavour combinations etc. can add real interest to your diet for very little extra effort, time, or cost. A few cheap herbs and spices can cost less than a single portion of what you're cooking and give you enough to enhance months worth of meals.

Cooking yourself a treat is great therapy. Cooking something a bit fancy for someone makes for a cheap yet heartfelt date night. Cooking a meal your family enjoys is really satisfying. Everyone should learn to cook, just a little.

Knot tying is a handy skill and easy to acquire. All you need is a short length of rope and watch a few videos. There may be thousands of knots you can learn, but most people should take the trouble to learn a few tried and true knots. Maybe you want to move a mattress on the roof of your car. Maybe you want to tie a pen to a clipboard. Maybe you want to tie back the legs when roasting a turkey. Maybe you need an impromptu collar & leash for a stray dog. Maybe you have to move a huge bundle of brush you've cut. Maybe you want to tie neat looking stopper knots on your hoodie's drawstring. Knowing how to tie a few different knots will give you options when you're trying to get stuff done.

Drawing! We all start life drawing, scribbling, experimenting etc. But often we drop the activity or don't think were good enough to try. But everyone should take a pencil/pen and paper and just try to draw things, if you want to try and improve quickly look into https://drawabox.com

Pros - It's cheap, easily available to most and often very cathartic.

Cons - if you get into it it takes a lot of time investment to get really good.

As a car enthusiast, I’m a little biased with this one, but beyond knowing how to change a flat, you should know how to do basic maintenance on your vehicle. Oil changes, brake replacements, etc. Some people are just not interested, which I fully understand, but for those who are, you can save some money with labour costs (and parts in some cases) doing the maintenance yourself.