Best marketing tips for WordPress service (or general SaaS product)?

Hey Everyone,

For the past two years I've been actively trying out a bunch of different methods for marketing Kernl.us. I've tried...

• Adwords

• Twitter Ads

• Content marketing

• Promoted tweets on industry accounts

• ...and others

What are your go-to methods for acquiring new users? Specifically in the WordPress services area, but generally for any SaaS would be fine too.

Thanks!