A short post for a lazy Sunday. Grant Rettke over at Wisdom and Wonder has a quick tip. He recommends trying describe-symbol for invoking Emacs builtin documentation. He says that it’s almost always what you want when you invoke describe-function or describe-variable. As far as I can see, it’s the same information. I looked at the source code but it was hard to tell if it adds extra data or not.
You invoke it with Ctrl+h o so if nothing else you need remember only one shortcut for your documentation needs.
UPDATE : Grant remarks in the comments that one of the reasons he likes describe-symbol is because it tells you when there is a variable and function with the same name.