When I'm writing code, there's one file I need to access constantly - WinError.h, the file that lists all the Windows errors constants. SSSSoooo... I had to find a way to get to the file which is buried somewhere in the C:\Program Files\blah blah\Visual Studio blah blah\VC\something\include\lots-of files-starting-with-'W'-and-ending-in-'h' folder, often and quickly.
What I did was so simple, it's almost silly - I placed a link to the file Quick Launch toolbar! Simple as that!
I know this is not rocket-science, but this little tip has saved me a ton of time!