For some reason, Apple decided to hide the user's Library folder in the Finder. Here's a quick tip to keep it visible.
Run this command in the terminal to show the Library folder once-again:
$ chflags nohidden ~/Library
(to revert back to the default, change nohidden to hidden)
Tip via Unhide Library Folder in Mac OS X 10.7 Lion - Se7enSins Forums.