I got a (what I think to be) cool idea from Nassim Nicholas Taleb: make some small mistakes when you can do so without lots of damage.
So, if you don’t go to the restaurant and make mistakes when you are young, when you grow up you can make a fool of yourself in an important situation.
If you don’t travel, you don’t expose yourself, this gets harder later in life.
I got into a situation like this right this year when I had to order a Taxi in Constanța.
I wasn’t used to it, I didn’t have any numbers on my cell phone, it took around 10 minutes to call various companies (I had no idea which to pick).
Finally, a pirate cab stopped and offered me a poor deal, which I took, being pressured by time.
Things might have gone better had I been used to ordering a cab when the pressure was lower, and now I would have gone in repeat mode.
The conclusion? Make errors when you’re young, it will be easier to avoid errors when you get older.
