This promo code thing seems to work very well for BOTW - the Best of the web directory created in 1996.

Again they make it a

$10 OFF ALL Directory Submissions!

Use the following Promo Code on Step 2 of the Directory Submit process to take advantage of the current low pricing and save an additional $10 on all submissions during the month of December.

PROMO CODE: 8F5G4X (expires Jan 1st)