If you’re an engineer who’s signed up with GrabCAD and have uploaded a bunch of CAD models that you’ve designed then you should follow Robert Harvey’s example and put your personal portfolio address on your business card.
We’ve seen other members spread their profile link in forums and email footers but Robert is quite possibly the first person to promote their portfolio on a business card. An excellent idea!
If you’re not sure what your personal address is then head to your profile and look at the browser address bar (you have to be signed in). Another thing to remember - when you change your name in your profile then the address will change too.