There are also test pads on the back if you don't want to risk shorting something out.
The only electronic stuff I've ever worked on is automobile related. These electronics are so compact that I feel like you almost have to have a surgeon's hands even just to get your probe on those pads!
Photo for reference for folks who may be coming to this thread without reading any of the others.
GND and VCore are your friends when playing with voltage and different clock speeds. I've got several sticks running for 72 hours with 0 HW errors at 400 Mhz, others are more picky and can only get them to 375Mhz.