If you use Irssi as your IRC client and are in a lot of channels like me, sometimes it is hard to quickly navigate to the window you want. I found it convenient to set aliases to , . and ;.

Set Aliases

/alias . window goto
/alias , window number
/alias ; window name

Example Usage

/. 23 (go to the 23rd window)
/. #freenode (go to channel #freenode)
/; f (rename the current window to f)
/. f (go to window f)
/, 2 (make the current window number 2 - you can do Alt-2 to go to this window then)