Here are 10 interesting rules that the Founders Institute lives by. I would qualify that these are great for internet based startups, but as you start to move away from that a lot of these ideas don't apply as uniformly. Even the occasional internet startup won't follow these rules strictly and still be a great business model.
The ones that are my favorites though are the last two. I have heard so many ideas where the founder has not tried to kill or not shared broadly enough and as a result has gotten further along in building the business than they likely should.