Never take shit from your inhibitions.
Find something harmless you don’t dare to do, then make a habit of doing it anyway.
Get in the shower while the water’s still cold. Throw out spiders. Google for photos taken from high buildings, make one your desktop for a while.
Work out. Your body is quite possibly the most amazing system in the known universe, and you’ll be using it a lot. Condition it so that you can use it to its full potential.
Offer your help to random strangers if you think they need any.
Be patient with grumpy people, they’ve probably had a rough day.
Donate money to charity.
Help other people donate money to charity. Click all six buttons on Click To Give every day. Play Free Rice every day.
Think about the environment before you print, or accept a plastic bag you don’t need, or leave the lights on or let the water run for no reason.
Get a working understanding of science. Read popular science books, watch documentaries.
I recommend Carl Sagan’s Cosmos series, even if it’s a few decades out of date.
Learn about logical fallacies. Learn why they’re wrong, and learn to recognise them when someone tries to use one on you.
Find something you love to do, then put effort into becoming really good at it. You might be able to make a career out of it later.