We have to follow directories which are according to the googel Guidelines so here is the list which contain directories which are one of the best and fullfil Google Guideline
1. http://www.Clasione.com
2. http://www.AllBusinessNow.com
3. http://vlib.org
4. http://www.picknbuy.com
5. http://www.ipl.org
6. http://www.seekon.info
7. http://www.JoeAnt.com
8. http://www.dmoz.org
9. http://www.botw.org
10. http://www.stpt.com
11. http://MedicalHealthSites.com
12. http://www.HealthFitnessNutrition.org
13. http://www.nlm.nih.gov/medlineplus
14. http://www.SearchPure.org
if we notice that from last few years Google has taken very strict action on the directories which are against its guidelines. You don’t need to follow the huge list of directories only follow some of the best and quality directories the quantity does not matters only the quality matters in SEO and especially if we talk about the directories the same is applicable in this case. In order to be successful with Google and Bing We have to follow above list.