I use a steddy eddy monopod on my TenPoint. It mounts to the front swivel stud and folds under and clamps to the crossbow butt stock for carry. You can shoot the crossbow off hand without dropping down the monopod. Works well from the ground or in a treestand without the worry of dropping it or having the crossbow fall off the rest. When it's folded up to shoot off-hand, it's handy to hold the monopod grip with your non-shooting hand and has the added benefit of keeping your hand and fingers well below the string. I think these will fit other bows beside the TenPoint but a call to their factory will confirm this.
The older I get, the stronger gravity becomes.