Another vote for the sandbag and for Ross Enemait's low tech high impact type training.
An alternative is to use sacks of dog food. I do Happidog squats and presses sometimes when I get a new sack.
Another training tool which can be helpful (if you have them around) is children. Then can be persuaded to climb on your back and be pressed about, and are unevenly distributed etc. to make it a bit different from standards weights.
You can see my training log if you're really bored: [url]www.veganfitness.net/viewtopic.php?f=8&t=16086&start=360[/url]
I find the actual sand part of the sandbag a pain in the arse and intend to find an alternative filler. this vid has given me some ideas
"When you are born, you are set forth to die. The fact that you live or don't live between these two dates depends solely upon your own will, opportunities and desires. The weight exerciser, of course, indicates that he chooses to live." Joseph Curtis Hise