I typically put it down vertical leaned up against another game or secure object, on carpet flooring. You want to Avoid hard surfaces that are much colder than actual room temp; i.e concrete or tile flooring. I will never put it all the way lying down, just lean it against something and just avoid surfaces that can have a dramatic difference in temperature vs room temp.

Simply put something soft on the floor a piece of carpet is ideal. And stand the glass upwards and lean it against a wall vertically. If the wall is plaster it should be fine otherwise put a rag or cloth behind it the top.

Trick is not to put it down on something hard. It is not that fragile.

Obviously don't put it where there is wind.

Dont lay it flat, awkward to lift.

Very carefully on carpet, making sure not to bang the corners.

I work as a glazier, on site we rest glass on offcuts of timber and for big panels , say 100kg + in weight, we use carpet sample books at each end as it allows us to rest the glass and gives room to put your hand under to lift.

I put mine down on a stool that has a semi-hard rubber top that has some give. I NEVER put glass down on a hard floor.

Never had a piece of glass set down break, but I've had three pieces of glass break on me - two that turned out to be simple plate glass (very dangerous) that broke as I was taking them out of the machine and one sheet of safety glass that probably got the corners hit as it was being taken out. A mess to clean up, but a safe mess.

If you have any glass that you are unsure of, replace it with tempered glass. The risk of injury from broken plate glass isn't worth saving a few dollars.

Like others have said, put it down vertically, leaning against a wall. If you have tile or cement floor then get yourself a carpet square or carpet sample to put it on to protect the edges. I haven't broken one in a game yet (knock on wood) but did have one break on me when putting it out to the curb (it was super scratched). I was carrying it, turned to put it down, the wind blew, and it disintegrated in my hands. Scary, but not a scratch on me.

Dave

To me it isnt so much about putting it on wood or concrete, its that sometimes we dont realize how fast we are setting it down, and too much force while lowering it will cause it to explode. When lowering it I catch it with the tip of my shoe to dampen the impact