Hello,
I've made complete guide for few of my friends about making not only a RPi stable headless unit, possibly used as a webserver. I explain in details all steps I've made during my half year of testing. I know it's to broad for usual post, but I hope it can help someone.
It's still in progress and I'll be happy for feedback.
* systemd with some of it's features (network, timesyncd, journaling)
* journaling
* setting ZSH, vim
* networking
* timesyncing
* config SSH, tips for SSH with screen
* setting nginx (webserver, ftp)
* system analyzing
* torrents
* backuping
Configs included.
HTML ReadTheDocs version: http://tutos.readthedocs.org/en/latest/
Here is github source: https://github.com/kotrfa/tutos