Leave router switched on 24/7 ?

[Eddy <eddy.bentley@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

I understand from reading lots of reviews and reports that the problem
some people have found with many routers is that they have overheated .
 . and died.  So while I have positioned mine upright and with plenty
of air around it, I am wondering if its not silly to leave it constantly
plugged in - with all its lights on and other parts receiving current
too.   It's so much easier to leave it on all the time though.  

I was wondering what most of you do.

Thanks.

Eddy.