I was rooting around back in the warehouse this morning and I came across these awesome power cord handles! I see I am a little late to the party on this product, since some of you have posted info on this as far back as 2008. But for those of you like me that have not seen it I thought I would post some info.
These are by Coil nWrap and it is a nylon handle that is Velcro'd on to the head of you're existing power cord that does not already have a nice handle on it. The nice thing is there is no chance it wont fit in a power post and can be moved to different cables easily. And makes disconnecting power cords so much easier. Also works on the male or female side on cable to cable connections which are usually tougher to get apart.
Very cool inexpensive solution only $9.19ea for either the 30 or 50 amp versions.
More details -- > Coil nWrap Plug Dog Power Cord Handle