calmy pop your hand under the bum with your other hand securely around the chest and then you can hold them close to you ^^ of course if they are very skittish you could try catch them in a box just lure them in with lettuce
I pick them up by putting my right hand under their chest and use my left hand to hold and support their rear. I have their right front leg anchored in the "V" between my thumb and pointer finger. My thumb and four fingers hold them securely.
initially if they're very skittish , i use a cuddlesack and they happily go in and i pick them up. now that they know what it's for, i can't do that anymore! XD
luckily, one of my girls is okay if i slide one hand under her chest, lift her front up slightly, and slide my other hand under her rear and lift. the other one i have to do a quick swoop with both hands she hates being picked up but is PERFECTLY okay after being lifted up. -_-
the only picture i have of a piggy being held is by my hubby. 30 seconds later she peed in his hands.