[sdiy] circuit protection question

[David G. Dixon]

Here's a question for the gurus:

Do you generally bother with circuit protection, specifically against power
rail reversal?

If so, which technique do you typically use?

I'm thinking: power rail, to polyfuse, to reverse rectifier diode (e.g.,
1N4001) to ground, to circuit.  The diode will protect the circuit while the
polyfuse trips.  Does this seem like overkill?