Tactical marketing for software startups

I'm not an expert, but here are a few little ideas I've honed for building an audience, brand, and community at software startups.

These are tactics, not strategy. Not a complete list. Steal them all or some. Not in a particular order, other than the first two and the last one.

People who are doing particularly technical startups like databases or compilers are the ones who often, in my experience, feel like these least apply. But in fact they are absolutely relevant.