How do I make Emacs show blank spaces?

How can I make Emacs show blank spaces (like a space, a tab, a line-jump, etc). Many other editors like Kate and Eclipse have this feature and I find it very useful to see when code is indent-broken because of mix of spaces and tabs (particularly Python).

WhiteSpace mode is an Emacs minor mode for visualizing all white space characters in the current buffer. It can be activated with M-x whitespace-mode.

Here is a screenshot of WhiteSpaceMode in action taken directly from the Emacs wiki,