How do You Learn? (Community Calling!

So I've been thinking to myself "How can I improve my learning skills for hacking, while also contributing to the community?", and I came up with the idea of everybody commenting on how they learn and remember the various hacks and such on not only Null Byte, but also all over the web. For example, I have bookmarked a couple of tuts that I run through daily trying to remember how to preform them on my own, then I test myself on it and if I get stuck, I come back to the page. Another way that I learn is I write note cards for different commands and different important places on the linux system.

In one note card for example, I have it labeled "Places1" and underneath that, I have written:

Apache's default webpage ~ /var/www/index.html

Kernel options ~ /etc/systcl.conf

Installed kernel module configs ~ /etc/modprobe.d

File system table ~ /etc/fstab

Config for DNS static hosts ~ /etc/hosts

DNS servers config ~ /etc/resolv.conf

Name resolution order ~ /etc/nsswitch.conf

Crontab (event scheduler) ~ /etc/crontab

Logs ~ /var/log

And that's just under "Places1". (one of these days, I'll write up a whole document with my note cards for everyone to use)

But any who, enough about me. I want to hear about how you learn and remember the various hacks around the web!