Lacking a "real" publisher, I have to get my books out and about. Since I'm a shy person (face-to-face with somebody from whom I'm asking a favor) gives me the heebie-jeebies. I like to write, but I hate to do the marketing thing.
All that being said, I've found that the more editions you have of your self-pubbed book, the broader distribution it gets without you having to do much except create the book editions.
For example, I recently released "Quest for the Simurgh." Uploaded to Lightning Source and through CreateSpace, but used my own ISBN. Large print? Sure, why not. Did that through CS, too, but using their ISBN. I also uploaded ebook format to Smashwords.
So, three different editions are making their way across the cybersphere. Here are the links to all the sites that sell the book in one or more of its incarnations:
Print at Amazon.com
LARGE PRINT at Amazon.com
Kindle at Amazon.com
Print at B&N
LARGE PRINT at B&N
Ebook at B&N
Ebook at Smashwords
Large Print Edition at CreateSpace
Print at CreateSpace
That doesn't count all the 3rd party vendors, of course.