There are lots of first rules. Goodkind promulgated the Wizard's First Rule. Asimov put forth the First Law of Robotics. You do not talk about Fight Club. And so on.
One of my favorite first rules is the first rule of gunfighting - Have a gun. This rule can be applied to many situations besides an armed encounter. Like self publishing electronically. Or, for that matter, submitting traditionally. The rule? Have a manuscript.
Sounds dumb, I know, but it is a very useful reminder for me. It's easy to get caught up in the internet hubbub, social media and publishing gossip. Promotions seem alluring, gotta get the word out, right? Wrong.
The first and most important thing I need to be doing, every day I can, is writing new work. Absolutely has to come first. When I have a manuscript to show for my efforts, and it's up for sale, then maybe some promotion is in order. But, it's all to easy to get the horse before the cart.
I am currently of the belief that the best promo I can do is to put out new works, though. And one of the rules of gunfighting that many people put second is - have a back-up gun. So the second rule of Book Club is the nearly same as the first rule - Have another manuscript.