Credit for the picture: billiambabble on deviantart. This is his Fate Dice printable pdf. He is one of the great people you’ll hear about later.
The short answer is that I search the internet and follow great people.
Behold, the Great People
And many others that I have accidently left out. So sorry! It’s well past bedtime and I am still typing.
I Search the Internet
I search for free stuff on DriveThruRPG because there is someone, like me, always coming up with something. I poke around indie rpg sites. I google search the phrase “New Pen and Paper RPG”. I also search for “New Roll20 module” to see if someone has ported a game I haven’t heard of into Roll20.
You Post a Lot of Links
Yes, but I also heavily invest in following people on Google+. G+ has its issues, but it is not so overwhelmingly huge like faceyspaces. I follow folks that love Board Games and RPGs and Wil Wheaton. (Wil Wheaton deserves his own category because he falls into categories one, two, and a couple others not listed.)
I post about my random ideas and meet new people that create all kinds of wonderful things. It’s true that I prefer older games, but I am amazed at what people come up with. Kevin Crawford can make any game with old school rules. The Hydra Collective invents all kinds of awesome stuff. John Stater, James Spahn, and others push the envelope on what’s possible.
Did you know that John Stater made a football rpg? I love it love it love it. Go buy it. Go buy it now. (Yes, I have already added a house rule about Tight Ends. Don’t look at me like that.)
I also talk to folks outside of the old school set. I joined a Dungeon World group and it shapes how I run games. I read the writings of Kyrinn Eis, Michael Wolf, and Ryan Macklin. I read about anything from Evil Hat Games.
I read the great archivists of the OSR. I read the Blue Room archives of Tekumel. I read about Fate games and various settings.
You get the idea. I read a lot, talk to great people, and share. Do that, and you find out about new rpgs.