“I can’t pick up my cat. My cat is too wiggly.”

Try the “football” hold.

Tuck the cat’s body into your waist, with your forearm pressed against your cat’s torso and your hand under his chest. If your cat wiggles, use your other hand to hold on to the loose fur around his scruff (back of his neck).  I call this the “football” hold because it reminds me of the way football players hold the ball when they’re running down the field.