The requirements of running a server.

[Slayden]

Greetings,
I've created this post to ask of those whom have experience (little or great) on running a server. I would greatly appreciate it if i could get an tips and good info on what they highly suggest.
My brother and i have decided to actually build a comp from scratch, almost specifically for doing this.
Any suggestions would be great from the computer itself, programs/connections, or just anything at all that you could suggest to help make this server one of, or the best.
I want to learn from those of you with first hand experience.
Thank you,
-Slayden.
^