Build much better UIs than my competition. It's a known issue, we developers rarely take the time to bother with UI and it's a shame because it makes all the difference in the world, especially in web apps. Clients can't tell technical superiority, they can only judge from what they see and if your UI is stellar you'll make selling a lot easier. And you know, judging from the fact that so many of us are afraid of the sales side this could be a lifesaver. Build better UIs to counteract the fact that you suck at sales.