User Library in Lion and Mountain Lion

After upgrading to Lion you will notice that your user's Library's folder is missing.  Don't worry, It's still there.  Apple decided to hide it so users don't mess around with this very important folder.  To unhide it, simply open Terminal (Applications ==> Utilities ==> Terminal) and input the following command:

chflags nohidden ~/Library/   #to show the Library folder

To change the setting back, input into the Terminal:

chflags hidden ~/Library/ #to hide the Library folder

You can also click this link to access this secret on Blacktree's Secret's page.  Secrets is a preference pane that gives you a graphical interface to access all of your Mac's hidden treasures.  You can download the software here