All this consumption is very well and good and might just make you a better roleplayer/gamesmaster/creator but nothing, and I mean nothing, can replace the actual act of creation. Go away and make something. Create, upload, share and improve through feedback. Stop reading this and make something, when you've made something come back and tell us all what it is.
While patting out my Guide to Writing a Free RPG (which is turning into a monolithic series coming soon), I have also been working on my other monolith: Icar - doing my best to deal with all of its misgivings. As such, it's approaching a very raw alpha, which I will tentatively proffer to those poor sods who were infected by the filth that is the current version.
I have a smorgasbord of blog posts about to arrive but the best advice I've only recently realised is go and make something, there is no substitute. I took an unscheduled pause, which is now clicked off and my advice to you is Go and create!