I have troubles with sun-loving plants getting too hot in the sun too. I don't think it was mentioned yet that the color of the pot can make a huge difference. A white pot will not get anywhere near as hot as a black or dark green one. If it gets too hot to comfortably put your hand on it, it's probably way too hot for the roots of most plants.
I also moved plants off of my deck, (in previous years, we moved this spring,) painted a not-terribly-dark shade of gray, but it would get too hot to walk on in bare feet. That's too hot of a place to sit pots.
Love to find spots where the pot can be in shade but the plant is in the sun, hard to finagle!
