I do a lot of seo work and getting in directories is always part of that. You have to pick through the good and the bad to find good direcotories that are worth submitting to and also paying for submission. One of the best ones I always consider is Best of the Web (botw).
They have been around a long time and you can get 15% off of their submissions a couple times a year. Their latest one was a promo code for 15% in May. Just click here and enter MAYDAY at checkout here to get the discount.
Good luck and let me know if you find any other promo codes.”