Train of thoughts, crashing...

Thankfully I had a bit of time to spend off the constant motion of thinking and creating, and now I'm trying to get back on track but to my surprise things are not going as smoothly as I want them to go, I have little sparks but they fade fast without connecting and maturing into a full idea, the issue maybe is that I switched my attention lately into trying to understand marketing instead of focusing on developing, as one thought came to my mind "If i make the game and no one knows about it, what's the point ?"
Am trying to figure out the face book adverts and google ads but it all feels like a money suckling scheme, or I don't really understand how it works, here is the thing when you start your one man project, you are the developer,artist,programmer,marketing team,puplishing studio and much more