Overview
Probably most people allready know how to find their steam ID but because there don´t exist an guide for it on english, i think this could help the people who still don´t know how they find it
What is a steam ID?
Every steam account has it´s personal steam ID. Steam ID´s are used for a lot stuff: like banning hackers from your server, giving a person admin/vip on your server or for stuff like rank plugins to safe the stats of each player.
Console
For finding your steam ID you first need to have the Developer Console enabled. DeNial the Fish made a great guide about how to enable the Console ingame. So if you still don´t got the console enabled go watch his guide [link]
and come afterwards back then you have the console enabled.
How to find your steam ID
You can join a server or go on create server and then pick what ever map you want.
Then you are ingame type into console status. It will look like the following text i marked:
(larger version)
[link]
You will see the name of every person playing on the server and their steam ID´s.
Your steam ID is right after your name, as you can see my steam ID is STEAM_0:1:34783317
Hope this helped some people along