leave the pc connected to the mains ... if it has a switch on the back of the psu then turn that bit off .. hold onto the chassis of the pc for around 2 minutes as this will normally discharge any major static to earth...
then either disconnect from mains power and plug in memory but hold onto the case with one hand at all times..
not the ideal way of static removal but it does work, and make sure you dont move your feet around too much on the floor as that can build it back up (carpet) ...
not too hard to do with one hand either