Here is a list of resources that have helped me immensely along the way…
How to Start and Build a Law Practice by Jay Foonberg @JayFoonberg
Solo by Choice: How to Be the Lawyer You Always Wanted to Be by Carolyn Elefant @CarolynElefant
Solo by Choice The Companion Guide: 34 Questions That Could Transform Your Legal Career by Carolyn Elefant (I’m profiled in this one!)
MyShingle.com, founded by Carolyn Elefant
Solo Practice University, founded by Susan Cartier Liebel @SCartierLiebel
Solosez: free e-mail listserv sponsored by the ABA for solo and small firm practitioners; also has a document repository (TIP: register with a Gmail account or other platform that organizes messages into conversations)
ABA National Solo and Small Firm Conference: They aren’t great about updating the website, but the next one is in Lexington, KY in late October 2013.
Feel free to add yours in the comments!