I already broke the first rule (don't do the cover yourself). Oops.
And, of course, the fifth one:
5.) Just because you can, doesn’t mean you should.
Though this headline could also apply to the idea of self-publishing itself (and it is true, just because you can do it, doesn’t mean it’s your best option), I’m actually talking about checking your sales records on Amazon, B&N and Smashwords. It’s going to be difficult not to wake up and immediately open the relevant sites to check on sales, and then to check them every fifteen seconds thereafter.
Just because you can figure out how many people have bought that week, that day, or even that hour, doesn’t mean you should. It’s like how you occasionally have to give yourself a Twitter break, lest you realize you’ve done nothing all day but talk about squirrels in literature. So remember to give yourself a break. You (and your friends) will be happier if you do!