I too learned very early to loop my amp cord through my strap. I've also begun taping down the ends of my amp cords to the floor so I can't disconnect them by kicking them. If I'm using my wireless I wrap the amp end of cords around the handles of my SKB rack. One more thing, since my head fell off my cab one time while pracitcing on a "bouncy" floor I've begun keeping cargo tie downs on hand to strap my head to my cab if it strikes me that the head might shake off the amp.

Paranoia is a very good thing when it comes to gigging.