1. Pick up the nearest book of 123 (or more) pages.
The Alice B. Toklas Cook Book, Anchor edition, 1960, by Alice B. Toklas
2. Open the book to page 123 and find the 5th sentence.
Be sure that no skin remains.
3. Post the next 3 sentences.
It is very unpleasant to encounter. Tie the fish together. Roll out the dough, place the fish in it, moisten the edges of the dough.
4. Tag 5 people.
If you're feeling it run with it.