Step 1: Select a prime target sock, preferably one that's been worn to within an inch of its life. A faded athletic sock or one with a questionable smell will do.
Step 2: Employ the ol' switcheroo: swap the sock with a nearly identical decoy. The key is to create a plausible deniability.
Step 3: Execute the vanish: feign nonchalance while the decoy 'accidentally' disappears down the laundry chute or gets 'munched' by the washing machine.
Repeat as necessary, but be aware, the Sock Police are watching.
For more advanced techniques, visit our Sneaky Swap subpage or our Sock Sleight of Hand subpage.