The great thing about using Squidoo as a Web 2.0 property, buffer site or article directory, whatever you want to call it. Is that a Squidoo Lens is automatically given page rank of 7, which is a bonus unlike many other directories. You should at least have one high quality Squidoo lens if your serious about ranking for a keyword. Emphasis on high quality, unique content, image optimized, etc.
There is a service on Fiverr, from a user named Disc0unts. If you don't mind shelling out a Fiverr for a lens, he makes them with extreme quality. Highly recommended.