I’m not sure where I picked this tip up but I heard about dragging the Applications folder to the OS X dock in order to provide one-click access to all applications (not just the frequently used ones).
At first I was pretty underwhelmed (it didn’t seem to do much except launch a new Finder window) but then I realised that if I click and hold the applications folder icon in my dock then a menu opens up with all the available applications. Dare I say that it’s a bit like a Start Menu for the Mac!
I’d have said it’s more like adding a folder to the task bar.