what is the most efficient marketing strategy for 4-6 hours weekly? posts/comments on Reddit? 

If anyone has built a consumer mobile app with lots of competition and you got traction I would love to know your wisdom and takeaways from that. 

I'm thinking of making a mobile app for my next project. Those of you who have done it, how do you find ideas/domains people are searching for on app stores? How do you make sure these people will find your app? I guess doing keyword research for the web and directing people to your website wh...