Keywords:
Open each of the three different Library folders by keywords:
library system (open a Finder window @ /System/Library/) library hd (open a Finder window @ /Macintosh HD/Library/) library user (open a Finder window @ ~/Library/)
library visible (make library folders visible in Finder)
library hidden (hide library folders in Finder)
appsup hd (open a Finder window @ ( /Macintosh HD/Library/Application Support/)
appsup user (open a Finder window @ ~/Library/Application Support/)
If you would like to use keyboard shortcuts to open the folders - just setup the shortcuts you would like to use in the Alfred preferences.
Each shortcut has a keyword in the bottom (hd, system and user) - use these to identify what each of the shortcuts does.
Another useful feature of this workflow is the plist search - I hate how much time I have to spend finding a single plist file on my Mac, but with this workflow I can do this in a few seconds. You can do the same by typing the following in Alfred:
plist YOUR_SEARCH
Download Open Library Folders