> I can never remember the IP address of my work's VPN, so I created a text file on my desktop with the IP as its name. Whenever I need it, I do: Ctrl+Space, ~/Desktop/[IP] to select the file, '.' to treat the filename as text, tab to go to the action part of QuickSilver, start typing "clipboard" and when "Copy to clipboard" shows up, I press enter. It can sound like a lot of steps but it gives me the IP address in my clipboard without reaching for the mouse, without having to open a file or an app.

If you don't mind a bit of drag and drop, a text clipping [1] may be even faster... simply drag the IP address text to the desktop, then drag it back when you want to pull it back in... text clippings make your desktop into a super-clipboard (only downside is the resulting files don't sync over dropbox)

Though I'm mostly-keyboard, I use the mouse where it makes sense, and OSX's drag and drop is a huge time-saver.

[1] http://macstarter.com/2011/01/21/text-clipping/