Seek out your target audience and aggressively collect reviews in the app store of your choice. This has shown to be a highly effective way of rising to the top of long, long list of apps available.

Further, many industry news websites are hurting for content. Approach them with how your app can solve a problem for their readership and you'll likely get some good press from it.

Best of luck and feel free to reserve a time here on Clarity for more.
-Shaun