Message three friends you haven't contacted in 1+ year with personalized messages referencing specific memories

Identify a habit or substance you're dependent on and quit for at least 3 consecutive months

Stay afloat treading water continuously for 2 hours without touching the bottom or sides

Memorize Morse code and use it to send a real message

Write and send 10 handwritten letters(or email if you dont have their address) to people who have positively impacted your life

Assemble and successfully launch a model rocket with a partner

Learn to rappel down a cliff or wall

Go backpacking in the wilderness for at least 2 nights

Get 8+ hours of actual sleep for two straight weeks

Complete 12 hours of meditation* in a single day without leaving your room** *Breaks allowed for bodily functions. **Your room could be replaced with any single location, eg a picnic blanket in a park or wilderness, a meditation retreat, etc.

Break an outdated or obscure law that's technically illegal but harmless

Create a functional object using only materials you already have or can get for free

Prepare every meal at home for 30 consecutive days. No restaurants or takeout or delivery.

Go 7 consecutive days without spending any money at all. Pre-paid bills like rent and utilities are fine.

Increase your max set of pull-ups by 50% compared to your starting number (e.g. - 10 to 15) If you can't do one pull-up to start, then 50% more pullups with the same assistance level compared to your starting number.

Learn to pick a lock using lockpicking tools and successfully open a locked padlock you own

Take fencing lessons and win at least one bout in a sanctioned competition or tournament

Reach the summit of any mountain over 14,000 feet in elevation. https://en.wikipedia.org/wiki/Fourteener

Make sandals out of tires and go for a run in them

Get up before 7am every day for 2 consecutive weeks

Knit or crochet an article of clothing

Brew kombucha from scratch at home

Avoid eating out at restaurants for 2 or more weeks

Get your ham radio certification

Learn ice skating and be able to do a spin on the ice

Take creatine or a supplement you've been meaning to try every day for a month

Go for a 30-minute walk when you wake up every morning for a month with no phone

Drink at least your recommended amount of water each day for a month (half your body weight in pounds as ounces)

Go geocaching and find caches

Open a can of beans with no can opener

Play a game of chess at a local chess club

Run 1 full mile completely barefoot

Bike 3000 miles total in one year

Run 1000 miles total in one year

Complete a 100-mile bike ride in a single day

Spend 24 hours without phones computers or internet

Train for and complete a full 26.2 mile marathon

Go 30 consecutive days without drinking