Itch.io is probably the most popular place to put indie games. A lot of indie games that get published to Steam start there while in development to get feedback from players.
I'm on IndieDB and Itch. It's fun to be coding instead of gaming, thanks for the tips, I'm actually going to be on steam in 2-3 weeks in early release.
I hear about a fair amount of games from Podcasts, as well as from PC Gamer and other big gaming forums. Sometimes its Youtube, someone like Splattercat.