The Golden Rule of Startup Success
centernetworks.com
centernetworks.com
I don't think this is very clever. While "don't give up" is important, it could also be "don't forget to breathe", or something like that. It's not enough just to keep trying if you are not doing the right thing. I think there is not a Golden Rule, there are many smaller rules we all have to use to be successful (well, actually, as there are many different paths to success, there are many possible sets of rules-to-be-successful as well).
Bad ideas can be salvaged with good work ethic and execution. But make sure that you have the right idea before you start your march forward.